MAN2B2 Antibody

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Description

Applications in Research

The antibody is critical for studying MAN2B2’s role in lysosomal glycosylation and its association with congenital disorders.

Western Blotting (WB)

  • Dilution Range: 1:500–1:5000 (human samples), 1:500–1:2000 (mouse/rat) .

  • Observed Bands: Single band at ~114–135 kDa, depending on tissue or cell type (e.g., 135 kDa in HeLa and NIH/3T3 cells) .

  • Controls: Rat kidney, human thyroid, and transfected cell lines (e.g., sh-MAN2B2 NIH/3T3) .

Immunohistochemistry (IHC)

  • Dilution Range: 1:20–1:200 (human tissues) .

  • Tissue Staining: Detected in paraffin-embedded human thyroid and other lysosomal-rich tissues .

  • Protocol: Antigen retrieval with citrate buffer (pH 6.0) and secondary HRP-conjugated systems .

ELISA

  • Dilution Range: 1:2000–1:10,000 .

  • Use Case: Quantitative analysis of MAN2B2 in lysosomal fractions or conditioned media .

Role in Lysosomal Glycosylation

MAN2B2 facilitates α1,6-mannosidase activity, critical for degrading glycoproteins in lysosomes. Defects in this enzyme have been linked to:

  • Congenital Disorders of Glycosylation (CDG): Mutations in MAN2B2 cause CDG with immune dysregulation, growth failure, and neurodevelopmental issues .

  • Immune Dysfunction: Patients exhibit inverted Th/Tc ratios, elevated B-cell counts, and reduced IgG levels, linked to abnormal N-glycosylation of proteins like SAP30 and TGFB1 .

Disease Mechanisms

  • Glycan Profiling: LC–MS/MS reveals disrupted N-glycan structures in MAN2B2-deficient patients, impairing protein stability and immune function .

  • Therapeutic Potential: Hematopoietic stem cell transplantation (HSCT) has shown partial success in correcting immune deficiencies .

Technical Considerations

  • Cross-Reactivity: Rabbit antibodies show higher specificity for human samples; mouse antibodies are less common and may require validation .

  • Optimal Storage: -20°C in PBS/glycerol buffer to maintain stability .

  • Protocol Optimization: Dilutions and blocking reagents (e.g., BSA, goat serum) must be tailored per tissue or cell type .

Product Specs

Buffer
**Preservative:** 0.03% Proclin 300
**Constituents:** 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
Typically, we can ship your orders within 1-3 business days of receipt. Delivery times may vary depending on the purchase method and location. For specific delivery information, please contact your local distributor.
Synonyms
MAN2B2 antibody; KIAA0935 antibody; Epididymis-specific alpha-mannosidase antibody; EC 3.2.1.24 antibody; Mannosidase alpha class 2B member 2 antibody
Target Names
MAN2B2
Uniprot No.

Target Background

Gene References Into Functions
  1. MAN2B1 and MAN2B2 were expressed in Drosophila S2 cells and functionally characterized. Both enzymes were significantly inhibited by the class II alpha-mannosidase inhibitors, swainsonine and mannostatin A. PMID: 19722277
Database Links

HGNC: 29623

KEGG: hsa:23324

STRING: 9606.ENSP00000285599

UniGene: Hs.188464

Protein Families
Glycosyl hydrolase 38 family
Subcellular Location
Secreted.

Q&A

What is MAN2B2 and why is it a significant research target?

MAN2B2 (Mannosidase Alpha Class 2B Member 2) is an enzyme critically involved in the glycosylation process within cells. It plays a fundamental role in the breakdown of complex carbohydrates in lysosomes. Research interest in MAN2B2 has intensified due to its implication in lysosomal storage disorders and other metabolic diseases, making it a valuable target for studies in glycobiology and related fields. Understanding MAN2B2 function can provide crucial insights into disease mechanisms and potential therapeutic approaches for conditions related to glycosylation abnormalities .

What are the common applications for MAN2B2 antibodies in research?

MAN2B2 antibodies are primarily utilized in several key experimental applications:

  • Western Blotting (WB): For detecting MAN2B2 protein expression levels and evaluating specificity

  • Immunohistochemistry (IHC): For visualizing cellular and tissue localization of MAN2B2

  • ELISA: For quantitative measurement of MAN2B2 protein levels

These applications collectively enable researchers to investigate MAN2B2 expression patterns, subcellular localization, and potential alterations in disease states .

What is the recommended starting protocol for Western blot detection of MAN2B2?

For optimal Western blot detection of MAN2B2:

  • Sample preparation: Lyse cells/tissues in RIPA buffer containing protease inhibitors

  • Protein separation: Load 20-50μg protein per lane on 8-10% SDS-PAGE (MAN2B2 has observed MW of ~135 kDa)

  • Transfer: Use PVDF membrane with standard wet transfer (90 minutes at 100V)

  • Blocking: 5% non-fat milk in TBST for 1 hour at room temperature

  • Primary antibody: Dilute MAN2B2 antibody 1:500-1:2000 in blocking solution and incubate overnight at 4°C

  • Secondary antibody: Anti-rabbit IgG-HRP at 1:5000-1:10000 for 1 hour at room temperature

  • Detection: Use ECL substrate and image according to standard protocols

Expected result: A specific band at approximately 135 kDa corresponding to MAN2B2 .

How should MAN2B2 antibodies be stored for maximum stability and performance?

MAN2B2 antibodies should be stored according to these guidelines:

  • Storage temperature: -20°C for most antibody formulations

  • Buffer composition: PBS with 0.02-0.03% sodium azide or proclin300 as preservative, 50% glycerol, pH 7.3-7.4

  • Avoid repeated freeze/thaw cycles (aliquot upon receipt if frequent use is anticipated)

  • Shelf life: Typically 12 months under optimal storage conditions

  • Working dilutions can be stored at 4°C for approximately one week

  • Always centrifuge briefly before opening to ensure homogeneity

These storage conditions maximize antibody stability and maintain consistent performance across experiments .

What strategies can resolve weak or absent MAN2B2 signal in Western blots?

When encountering weak or absent MAN2B2 signal in Western blots, implement these methodological approaches:

  • Antibody concentration: Increase primary antibody concentration (try 1:250-1:500 if recommended 1:1000 fails)

  • Protein loading: Increase total protein loaded (75-100μg per lane)

  • Incubation times: Extend primary antibody incubation to 48 hours at 4°C

  • Enhance protein extraction: Use stronger lysis buffers with additional detergents

  • Blocking optimization: Test alternative blocking agents (BSA instead of milk)

  • Signal enhancement: Use high-sensitivity ECL substrate

  • Positive control: Include a sample known to express MAN2B2 (e.g., kidney tissue)

  • Verify antibody reactivity: Confirm the antibody recognizes your species of interest (many MAN2B2 antibodies are human-specific)

The observed molecular weight of MAN2B2 is approximately 135 kDa, so ensure your gel resolution and transfer conditions are optimized for this size range .

How can non-specific binding be minimized when using MAN2B2 antibodies in IHC?

To minimize non-specific binding in immunohistochemistry with MAN2B2 antibodies:

  • Optimize blocking: Use 5-10% normal serum from the species of secondary antibody origin for 1-2 hours

  • Add protein blockers: Include 0.1-0.3% BSA, 0.1% gelatin, or 0.5% non-fat milk in blocking and antibody dilution buffers

  • Titrate antibody: Begin with 1:50 dilution and systematically test to 1:200 to determine optimal signal-to-noise ratio

  • Include additives: Add 0.1-0.3% Triton X-100 for better penetration and reduced background

  • Perform antigen retrieval: Test both citrate buffer (pH 6.0) and EDTA buffer (pH 9.0) to determine optimal conditions

  • Extend washing steps: Use at least 3-5 washes of 5-10 minutes each with gentle agitation

  • Pre-absorb antibody: If cross-reactivity is a concern, pre-absorb with control proteins

  • Adjust secondary antibody: Reduce concentration if background persists

These methodological refinements should significantly improve the specificity of MAN2B2 staining in IHC applications .

What are effective validation controls when working with MAN2B2 antibodies?

To ensure experimental rigor when working with MAN2B2 antibodies, implement these validation controls:

  • Positive tissue control: Include human kidney tissue samples, which express MAN2B2

  • Negative tissue control: Include tissue known to have minimal MAN2B2 expression

  • Antibody specificity controls:

    • Primary antibody omission (to detect secondary antibody non-specific binding)

    • Isotype control (matching IgG at same concentration)

    • Peptide competition/blocking (pre-incubate antibody with immunizing peptide)

  • Knockdown validation: Use siRNA or CRISPR to generate MAN2B2-depleted samples

  • Overexpression validation: Analyze samples with MAN2B2 overexpression

  • Multiple antibody verification: Confirm findings with a second MAN2B2 antibody targeting a different epitope

  • Method validation: Corroborate protein detection across multiple methods (e.g., WB, IHC, IF)

These controls provide crucial verification of antibody specificity and experimental validity .

How can MAN2B2 antibodies be effectively used to study lysosomal storage disorders?

For studying lysosomal storage disorders (LSDs) using MAN2B2 antibodies:

  • Comparative expression analysis:

    • Analyze MAN2B2 expression in patient-derived cells/tissues versus healthy controls

    • Quantify using Western blot with densitometry analysis

    • Perform IHC in tissue sections to evaluate tissue-specific differences

  • Colocalization studies:

    • Use dual immunofluorescence with MAN2B2 antibody (1:50-1:100) and lysosomal markers (LAMP1/2)

    • Analyze subcellular distribution changes in disease models

    • Quantify colocalization coefficient using appropriate software

  • Functional interaction studies:

    • Immunoprecipitate MAN2B2 using optimized antibody concentration

    • Perform co-IP to identify altered protein interactions in disease states

    • Combine with mass spectrometry for comprehensive interactome analysis

  • Therapeutic monitoring:

    • Use MAN2B2 antibodies to track enzyme localization and activity following therapy

    • Apply in enzyme replacement therapy models to confirm proper cellular targeting

These approaches provide mechanistic insights into disease pathogenesis and potential therapeutic interventions for lysosomal storage disorders involving glycosylation abnormalities .

What methodological approaches can differentiate between splice variants or post-translational modifications of MAN2B2?

To differentiate between MAN2B2 splice variants or post-translational modifications:

  • Isoform-specific detection:

    • Select antibodies targeting unique regions of specific isoforms

    • Use epitope-specific antibodies recognizing amino acids 347-523 versus antibodies against other regions

    • Perform high-resolution Western blots using 6-8% gels for better separation of high MW variants

  • Post-translational modification analysis:

    • Combine immunoprecipitation with MAN2B2 antibody followed by:

      • Phospho-specific antibody detection

      • Glycosylation detection using lectins or glycosylation-specific stains

      • Ubiquitination analysis using ubiquitin antibodies

  • Mass spectrometry integration:

    • Immunoprecipitate MAN2B2 from cell/tissue lysates

    • Perform tryptic digestion and analyze by LC-MS/MS

    • Map post-translational modifications and variant-specific peptides

  • 2D gel electrophoresis:

    • Separate proteins by isoelectric point and molecular weight

    • Detect MAN2B2 variants by Western blot

    • Identify charge variants indicating post-translational modifications

These technical approaches provide detailed molecular characterization of MAN2B2 forms in different biological contexts .

What experimental design best evaluates the relationship between MAN2B2 activity and glycosylation patterns?

To assess the relationship between MAN2B2 enzyme activity and glycosylation patterns:

  • Integrated enzyme-protein detection:

    • Measure MAN2B2 enzyme activity using fluorogenic substrates

    • Correlate with protein levels detected by antibody-based methods in the same samples

    • Analyze ratio of activity/protein to identify regulatory mechanisms

  • Glycomic profiling:

    • Combine MAN2B2 knockdown/overexpression with LC-MS analysis of glycan profiles

    • Use lectin arrays to detect specific glycan structures altered by MAN2B2 manipulation

    • Correlate MAN2B2 antibody staining intensity with glycan profile changes

  • Cell-specific glycosylation analysis:

    • Apply MAN2B2 antibody in flow cytometry (1:100) combined with fluorescent lectins

    • Analyze single-cell correlations between MAN2B2 levels and glycosylation patterns

    • Sort cells based on MAN2B2 expression and perform detailed glycan analysis

  • Inhibitor studies:

    • Apply specific MAN2B2 inhibitors at varying concentrations

    • Monitor changes in enzyme localization using immunofluorescence with MAN2B2 antibody

    • Correlate with altered glycosylation patterns detected by mass spectrometry

This multifaceted approach provides comprehensive understanding of MAN2B2's role in glycosylation regulation .

When should polyclonal versus monoclonal MAN2B2 antibodies be selected for specific research questions?

Selection criteria for polyclonal versus monoclonal MAN2B2 antibodies based on research applications:

Research ApplicationPolyclonal MAN2B2 AntibodyMonoclonal MAN2B2 Antibody
Western BlottingPreferred for initial detection and higher sensitivityOptimal for highly specific detection of particular epitopes
ImmunoprecipitationAdvantageous for capturing various epitopesBetter for specific isoform isolation
IHC of fixed tissuesGood for antigen detection in fixed samplesMay have limited epitope accessibility
Conformational studiesRecognizes multiple epitopes, tolerates some denaturationEpitope may be lost in certain conditions
Cross-species detectionMay offer broader species reactivityTypically more species-restricted
Quantitative assaysHigher batch-to-batch variationSuperior for reproducible quantification
Post-translational modificationsCan detect protein regardless of modificationsCan be selected to be modification-specific

Methodological considerations:

  • Use polyclonal antibodies for initial characterization and applications requiring higher sensitivity

  • Select monoclonal antibodies when absolute specificity and reproducibility are critical

  • Consider using both antibody types to validate findings and provide complementary information .

How do different sample preparation methods affect MAN2B2 antibody detection efficiency?

Impact of sample preparation methods on MAN2B2 detection:

  • Protein extraction methods comparison:

    • RIPA buffer: Good for general protein extraction, but may not fully solubilize membrane-associated MAN2B2

    • NP-40/Triton X-100 buffers: Better preservation of protein interactions, recommended for co-IP studies

    • SDS-based buffers: Maximum extraction efficiency but may denature epitopes

    • Specialized lysosomal extraction: Optimal for enriching lysosomal MAN2B2

  • Tissue preparation considerations:

    • Fresh frozen: Preserves antigenicity but poorer morphology

    • FFPE: Standard for histology but requires optimized antigen retrieval (test both heat-induced citrate pH 6.0 and EDTA pH 9.0)

    • OCT-embedded: Good compromise between antigenicity and morphology

    • Cell preparation: Methanol fixation often superior to paraformaldehyde for MAN2B2 detection

  • Sample handling guidelines:

    • Avoid repeated freeze-thaw cycles

    • Include protease inhibitors in all extraction buffers

    • Process samples rapidly to minimize degradation

    • Consider phosphatase inhibitors as MAN2B2 may be regulated by phosphorylation

Selecting the appropriate sample preparation method based on specific research objectives significantly impacts MAN2B2 detection quality and experimental reproducibility .

What are the critical differences in protocol optimization for detecting MAN2B2 in different tissue types?

Tissue-specific protocol optimizations for MAN2B2 detection:

  • Kidney tissue (high MAN2B2 expression):

    • Reduce antibody concentration (1:300-1:500 for IHC)

    • Shorter primary antibody incubation (4-6 hours)

    • Mild antigen retrieval to preserve tissue integrity

  • Brain tissue:

    • Enhanced permeabilization with 0.3% Triton X-100

    • Extended primary antibody incubation (48 hours at 4°C)

    • More stringent blocking (10% normal serum plus 2% BSA)

    • Consider tyramide signal amplification for low abundance detection

  • Reproductive tissues (epididymis):

    • Special handling due to tissue-specific MAN2B2 variant expression

    • Higher antibody concentrations (1:50-1:100)

    • Test multiple antibodies targeting different epitopes

    • Extended washing steps to reduce background

  • Liver tissue:

    • High autofluorescence requires Sudan Black B treatment (0.1-0.3%)

    • Optimize peroxidase quenching (3% H₂O₂, 15-20 minutes)

    • Consider acetone fixation for better epitope preservation

These tissue-specific optimizations ensure consistent and reliable MAN2B2 detection across diverse sample types by addressing the unique characteristics of each tissue microenvironment .

How can MAN2B2 antibodies be effectively incorporated into multiplexed imaging systems?

Methodological approach for incorporating MAN2B2 antibodies in multiplexed imaging:

  • Antibody selection criteria for multiplexing:

    • Choose MAN2B2 antibodies from different host species than other target antibodies

    • Validate signal separation with single-stain controls

    • Test for cross-reactivity with all secondary antibodies in the panel

  • Technical implementation strategies:

    • Sequential staining: Apply tyramide signal amplification between rounds

    • Spectral unmixing: Use confocal microscopy with spectral detection

    • Multi-epitope ligand cartography: Apply cyclic staining-imaging-bleaching

    • Mass cytometry: Conjugate MAN2B2 antibody with rare earth metals

  • Optimal MAN2B2 antibody parameters for multiplexing:

    • Concentration: 1:50-1:100 dilution (higher than single-staining protocols)

    • Incubation time: 12-16 hours at 4°C for maximum penetration

    • Signal development: Select fluorophores with minimal spectral overlap

  • Quality control for multiplexed MAN2B2 detection:

    • Include single-color controls for spillover calculation

    • Apply automated image analysis algorithms for colocalization quantification

    • Use reference tissues with known MAN2B2 expression patterns

These approaches enable simultaneous visualization of MAN2B2 with multiple markers to reveal complex spatial relationships and functional interactions in tissue microenvironments .

What considerations are important when developing automated image analysis pipelines for MAN2B2 immunohistochemistry?

Critical considerations for developing automated image analysis of MAN2B2 immunohistochemistry:

  • Pre-analysis standardization:

    • Establish consistent staining protocols with minimal batch variation

    • Include calibration slides in each staining batch

    • Standardize image acquisition parameters (exposure, gain, resolution)

  • Segmentation strategy:

    • Develop specific algorithms for subcellular compartmentalization of MAN2B2

    • Incorporate nuclear counterstain for cell identification

    • Apply watershed algorithms for overlapping cells

  • Feature extraction methodology:

    • Quantify MAN2B2 parameters: intensity, area, subcellular distribution

    • Implement texture analysis for pattern recognition

    • Develop ratio measurements of MAN2B2 to lysosomal markers

  • Validation framework:

    • Cross-validate automated analysis with manual scoring by multiple experts

    • Establish threshold values based on positive/negative controls

    • Implement batch correction algorithms for multi-slide analysis

  • Data integration approach:

    • Correlate image analysis metrics with functional data

    • Apply machine learning for pattern recognition

    • Develop spatial statistics for tissue microenvironment characterization

These methodological considerations ensure reproducible and biologically meaningful quantification of MAN2B2 expression patterns across diverse sample types and experimental conditions .

How should researchers validate antibody specificity when studying MAN2B2 in non-human models?

Comprehensive validation strategy for MAN2B2 antibodies in non-human models:

  • Species cross-reactivity assessment:

    • Perform sequence homology analysis between human MAN2B2 and target species

    • Focus on conservation of the immunogen region (e.g., AA 347-523)

    • Test antibody reactivity in multiple species with Western blot

  • Epitope-specific validation:

    • Express recombinant species-specific MAN2B2 protein fragments

    • Perform dot blot or Western blot validation

    • Consider custom antibody development for highly divergent species

  • Genetic validation approaches:

    • Utilize knockdown/knockout models as negative controls

    • Implement CRISPR-Cas9 epitope tagging for antibody-independent detection

    • Overexpress human MAN2B2 in target species cells as positive control

  • Orthogonal validation methods:

    • Complement antibody detection with mRNA analysis

    • Correlate protein expression with enzyme activity measurements

    • Compare multiple antibodies targeting different MAN2B2 epitopes

  • Species-specific protocol optimization:

    • Adjust antibody concentration based on epitope conservation

    • Modify blocking conditions to address species-specific background

    • Optimize antigen retrieval conditions for each species' tissue

These methodological approaches ensure reliable MAN2B2 detection across species while maintaining scientific rigor in comparative studies .

What metrics should be used to evaluate batch-to-batch consistency of MAN2B2 antibodies?

Systematic approach to evaluating batch-to-batch consistency of MAN2B2 antibodies:

  • Primary performance metrics:

    • Signal intensity at standardized concentration (1:1000 WB, 1:100 IHC)

    • Signal-to-noise ratio in standardized positive tissue

    • Background in negative control tissues

    • Specific band detection at 135 kDa in Western blot

  • Quantitative assessment methodology:

    • Standard curve generation using recombinant MAN2B2 protein

    • IC50 determination in competitive binding assays

    • Titration curves comparing multiple batches

    • Coefficient of variation calculation across technical replicates

  • Application-specific consistency tests:

    • Western blot: Band intensity, specificity, molecular weight accuracy

    • IHC: Staining pattern, intensity, background, subcellular localization

    • ELISA: Standard curve parallelism, detection limit, dynamic range

  • Physical/chemical characterization:

    • Protein concentration verification

    • IgG purity assessment by SDS-PAGE

    • pH and buffer composition analysis

    • Accelerated stability testing

These metrics establish a comprehensive quality control framework to ensure experimental reproducibility when using different antibody batches in long-term MAN2B2 research projects .

How can MAN2B2 antibodies be optimally utilized in super-resolution microscopy applications?

Methodological framework for using MAN2B2 antibodies in super-resolution microscopy:

  • Sample preparation optimization:

    • Utilize thin sections (70-100 nm) for STORM/PALM applications

    • Apply specialized fixation protocols (2% PFA with 0.2% glutaraldehyde)

    • Use smaller gold particles (5-10 nm) for immunogold labeling in STEM

    • Implement resin embedding protocols compatible with antibody penetration

  • Antibody selection and modification:

    • Choose highest affinity MAN2B2 antibodies for improved localization precision

    • Consider direct fluorophore conjugation to reduce localization error

    • Test F(ab) fragments for improved spatial resolution

    • Validate epitope accessibility in super-resolution sample preparation conditions

  • Imaging protocol recommendations:

    • STED: Use 1:200-1:300 antibody dilution with overnight incubation

    • STORM: Implement oxygen scavenger system with optimized switching buffer

    • SIM: Balance signal intensity and photobleaching with 1:100-1:200 dilution

    • Expansion microscopy: Test pre- versus post-expansion labeling efficiency

  • Controls and validation:

    • Include spatial calibration standards

    • Perform correlative light-electron microscopy for validation

    • Use dual-color co-localization with established lysosomal markers

    • Implement cluster analysis algorithms for quantitative assessment

These technical considerations maximize the resolution and specificity of MAN2B2 detection in super-resolution microscopy applications for detailed subcellular localization studies .

What is the optimal methodology for using MAN2B2 antibodies in flow cytometry applications?

Comprehensive methodology for MAN2B2 antibody application in flow cytometry:

  • Cell preparation protocol:

    • Fixation: 2% paraformaldehyde, 10 minutes at room temperature

    • Permeabilization: 0.1% saponin in PBS with 0.5% BSA

    • Blocking: 5% normal serum, 30 minutes at room temperature

    • Cell concentration: 1×10^6 cells/100 μL for staining

  • Antibody optimization:

    • Titration range: Test 1:20 to 1:200 dilutions

    • Incubation conditions: 45-60 minutes at room temperature or overnight at 4°C

    • Secondary antibody: Highly cross-adsorbed fluorochrome conjugates

    • Signal amplification: Consider biotin-streptavidin system for low expression

  • Controls integration:

    • Fluorescence-minus-one (FMO) controls

    • Isotype-matched control antibodies

    • MAN2B2 knock-down/overexpression controls

    • Competitive blocking with immunizing peptide

  • Data analysis approach:

    • Gating strategy: Exclude dead cells, doublets before MAN2B2 analysis

    • Quantification: Mean fluorescence intensity rather than percent positive

    • Normalization: Use calibration beads for day-to-day comparisons

    • Correlation: Analyze MAN2B2 levels alongside lysosomal markers

This methodological framework enables quantitative assessment of cellular MAN2B2 expression levels while addressing the technical challenges of intracellular protein detection by flow cytometry .

How might MAN2B2 antibodies contribute to understanding the role of glycosylation in neurodegenerative diseases?

Experimental framework for investigating MAN2B2 in neurodegenerative diseases:

  • Pathological sample analysis methodology:

    • Compare MAN2B2 expression in post-mortem brain tissues using optimized IHC

    • Analyze region-specific alterations with brain tissue microarrays

    • Correlate MAN2B2 patterns with pathological markers (e.g., Aβ, tau, α-synuclein)

    • Quantify changes using digital pathology and automated image analysis

  • Cell model experimental design:

    • Establish iPSC-derived neuronal models from patient samples

    • Apply MAN2B2 antibodies in live-cell imaging with lysosomal trackers

    • Monitor MAN2B2 localization during cellular stress conditions

    • Implement MAN2B2 knockdown/overexpression in neuronal models

  • Functional glycomics integration:

    • Combine MAN2B2 immunoprecipitation with glycan profiling

    • Analyze alterations in glycosylation patterns in disease models

    • Correlate MAN2B2 activity with specific glycan structures

    • Develop targeted glycan rescue strategies

  • Therapeutic exploration methodology:

    • Screen compounds that modulate MAN2B2 expression/activity

    • Monitor glycosylation changes during treatment using lectins and MAN2B2 antibodies

    • Assess chaperone therapy effects on MAN2B2 trafficking

    • Evaluate enzyme replacement approaches with MAN2B2 tracking

These methodological approaches enable comprehensive investigation of MAN2B2's role in neurodegenerative disease pathogenesis, potentially revealing new therapeutic targets in glycobiology-related neurodegeneration mechanisms .

What considerations are important when developing MAN2B2 antibody-based assays for biomarker applications?

Methodological framework for developing MAN2B2 antibody-based biomarker assays:

  • Assay platform selection criteria:

    • ELISA: For quantitative measurement in biological fluids

    • Multiplex bead arrays: For simultaneous analysis with other lysosomal markers

    • Lateral flow: For rapid point-of-care testing

    • Mass spectrometry immunoassay: For isoform-specific quantification

  • Antibody pair optimization:

    • Screen multiple antibody combinations targeting different epitopes

    • Determine capture vs. detection antibody arrangement

    • Optimize antibody coating concentration (1-10 μg/mL)

    • Evaluate cross-reactivity with related mannosidases

  • Assay performance validation:

    • Establish limits of detection and quantification

    • Determine analytical measuring range

    • Assess precision (intra/inter-assay CV <15%)

    • Validate linearity and recovery in biological matrices

  • Clinical sample considerations:

    • Develop sample collection and processing SOPs

    • Evaluate matrix effects in different biological fluids

    • Establish reference ranges in healthy populations

    • Analyze stability during storage and freeze-thaw cycles

  • Clinical validation strategy:

    • Correlate with established biomarkers

    • Assess diagnostic sensitivity and specificity

    • Determine predictive value in longitudinal studies

    • Evaluate relationship to disease progression

This comprehensive methodological approach ensures development of robust MAN2B2 antibody-based assays with potential clinical utility in diagnosing and monitoring conditions related to lysosomal dysfunction and aberrant glycosylation .

What methodologies enable simultaneous analysis of MAN2B2 protein expression and enzymatic activity?

Integrated methodological approach for correlating MAN2B2 protein and activity:

  • Tissue/cell preparation protocol:

    • Split samples for parallel protein analysis and enzyme assays

    • Optimize extraction buffers to preserve both antigenic epitopes and enzymatic activity

    • Consider gentle non-ionic detergents (0.1% Triton X-100) for extraction

    • Maintain samples at 4°C throughout processing

  • Antibody-based protein quantification:

    • Western blot with densitometry analysis

    • ELISA for precise quantification

    • Immunocytochemistry with digital image analysis

    • Flow cytometry for single-cell analysis

  • Enzymatic activity determination:

    • Fluorogenic substrate assay (4-methylumbelliferyl-α-D-mannopyranoside)

    • Optimize pH conditions (pH 4.5 for lysosomal activity)

    • Include specific inhibitors to confirm specificity

    • Normalize activity to total protein concentration

  • Integrated analysis methodology:

    • Calculate specific activity (enzyme activity/protein amount)

    • Perform correlation analysis between protein levels and activity

    • Develop ratio analysis for functional status assessment

    • Implement multivariate analysis for pattern recognition

  • Advanced applications:

    • In-gel activity assays following native electrophoresis

    • Combine immunocapture with activity assays

    • Apply proximity ligation assay to detect active enzyme complexes

    • Develop cell-based reporter systems for in situ activity monitoring

This comprehensive approach enables robust correlation between MAN2B2 protein expression and functional enzymatic activity, providing deeper insights into the regulation of this important glycosylation enzyme .

How can researchers effectively characterize novel MAN2B2 splice variants using antibody-based approaches?

Methodological framework for characterizing MAN2B2 splice variants:

  • Antibody selection strategy:

    • Utilize antibodies targeting constitutive domains shared across variants

    • Develop/select antibodies against unique exon junctions or variant-specific regions

    • Implement epitope mapping to determine exact binding sites

    • Consider custom antibody development for novel junction sites

  • Western blot optimization:

    • Use high-resolution gel systems (6-8% gels with extended run times)

    • Apply gradient gels (4-15%) for simultaneous detection of variants

    • Implement 2D electrophoresis (IEF followed by SDS-PAGE)

    • Calculate precise molecular weights using appropriate standards

  • Immunoprecipitation-based analysis:

    • Perform IP with pan-MAN2B2 antibody followed by Western blot with variant-specific antibodies

    • Combine with RT-PCR validation of predicted splice forms

    • Analyze immunoprecipitated proteins by mass spectrometry

    • Correlate detected proteins with predicted splice variant sequences

  • Localization studies methodology:

    • Compare subcellular distribution of variants using confocal microscopy

    • Perform fractionation followed by Western blot analysis

    • Use proximity ligation assay to identify variant-specific interaction partners

    • Develop fusion constructs to confirm antibody specificity for variants

  • Functional characterization approach:

    • Correlate variant expression with enzymatic activity

    • Assess glycosylation profiles associated with specific variants

    • Evaluate tissue/cell-specific expression patterns

    • Analyze variant expression changes in disease models

This comprehensive approach enables detailed characterization of MAN2B2 splice variants, providing insights into their differential localization, function, and potential role in normal physiology and disease states .

What interdisciplinary approaches can maximize the research value of MAN2B2 antibodies?

Methodological framework for interdisciplinary MAN2B2 research:

  • Glycobiology-proteomics integration:

    • Combine MAN2B2 immunoprecipitation with glycoproteomic analysis

    • Correlate MAN2B2 localization with glycan alterations using lectin arrays

    • Develop activity-based probes compatible with antibody detection

    • Implement systems biology approaches to model MAN2B2 in glycosylation networks

  • Clinical research collaboration:

    • Establish tissue microarrays across multiple disease states

    • Standardize MAN2B2 IHC protocols across research centers

    • Develop centralized antibody validation resources

    • Correlate MAN2B2 patterns with clinical outcomes data

  • Structural biology integration:

    • Use antibodies to stabilize MAN2B2 for crystallography

    • Perform epitope mapping to validate structural predictions

    • Implement conformation-specific antibodies to probe structure-function relationships

    • Apply hydrogen-deuterium exchange mass spectrometry with antibody probes

  • Developmental biology applications:

    • Analyze temporal expression patterns during development

    • Study MAN2B2 in differentiation models using antibody tracking

    • Correlate expression with developmental glycosylation changes

    • Implement lineage tracing with MAN2B2 characterization

  • Bioinformatics integration:

    • Develop antibody epitope prediction algorithms

    • Create databases linking antibody validation data with experimental outcomes

    • Implement machine learning for image analysis of MAN2B2 patterns

    • Develop in silico models of antibody-antigen interactions

These interdisciplinary approaches maximize the research value of MAN2B2 antibodies by leveraging diverse methodologies and expertise across scientific fields .

How should researchers design comprehensive MAN2B2 studies that bridge basic science and translational applications?

Strategic framework for translational MAN2B2 research:

  • Basic science foundation:

    • Characterize tissue-specific expression patterns using validated antibodies

    • Determine subcellular localization and trafficking pathways

    • Identify critical protein interactions and regulatory mechanisms

    • Establish enzymatic activity correlations with protein levels

  • Disease relevance investigation:

    • Analyze expression alterations in patient-derived samples

    • Develop disease-specific cell and animal models

    • Correlate MAN2B2 dysfunction with pathological processes

    • Identify potential compensatory mechanisms

  • Diagnostic methodology development:

    • Optimize MAN2B2 detection in accessible clinical samples

    • Develop multiplexed panels including MAN2B2 and related markers

    • Establish reference ranges and clinical thresholds

    • Validate diagnostic sensitivity and specificity

  • Therapeutic target exploration:

    • Screen for modulators of MAN2B2 expression/activity

    • Develop enzyme enhancement strategies

    • Establish cellular assays for therapeutic monitoring

    • Design antibody-based tracking of therapeutic efficacy

  • Translational workflow implementation:

    • Create standardized protocols spanning basic to clinical applications

    • Develop biospecimen collection and handling guidelines

    • Establish collaborative networks linking basic scientists and clinicians

    • Implement data sharing platforms for integrated analysis

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