IDL2 Antibody

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Description

Overview

ID2 is a helix-loop-helix (HLH) transcriptional regulator that inhibits DNA binding of E proteins, crucial for cellular differentiation and development . It is essential for natural killer (NK) cell development, T-cell differentiation, and erythroid lineage regulation .

Research Applications

  • Flow Cytometry: ID2 monoclonal antibodies (e.g., clone ILCID2) are validated for intracellular staining in mouse and human cells .

  • Mechanistic Studies: ID2 deficiency enhances B-cell development while impairing erythroid maturation .

  • Therapeutic Insights: Linked to autoimmune arthritis via interactions with FcγRIIb receptors on B cells .

Table 1: ID2 Antibody Performance in Model Systems

ApplicationCell Type TestedValidation ResultSource
Flow CytometryMouse splenocytes97% purity with Foxp3 buffer optimization
Western BlotJurkat, A549 cellsSpecific band at 48-51 kDa confirmed
Functional KnockoutID2-deficient miceEnhanced B-cell populations observed

Overview

ISL2 is a transcription factor critical for motor neuron specification and axon guidance . Antibodies against ISL2 are primarily used in developmental biology and neuroimmunology.

Research Applications

  • Immunodetection: Validated for Western Blot (WB), ELISA, and Immunofluorescence (IF) .

  • Developmental Studies: Used to map motor neuron columns in zebrafish and murine models .

Comparative Analysis of ID2 and ISL2 Antibodies

FeatureID2 AntibodyISL2 Antibody
Primary FunctionTranscriptional repression in lymphocytesMotor neuron specification
Key PathwaysB-cell development, NK cell maturationAxon guidance, neural development
Therapeutic RelevanceAutoimmunity, cancer immunotherapyNeurodevelopmental disorders
Common AssaysFlow cytometry, knockout modelsWestern blot, immunohistochemistry

Critical Challenges in Antibody Validation

Recent studies highlight that ~20% of commercial antibodies fail specificity tests, emphasizing the need for rigorous validation . For ID2 and ISL2:

  • ID2: Co-immunoprecipitation with E2A confirmed functional interaction in Hodgkin/Reed-Sternberg cells .

  • ISL2: Specificity demonstrated via antigen-competing ELISAs and cross-species reactivity .

Future Directions

  1. ID2: Explore therapeutic modulation in autoimmune diseases via FcγRIIb targeting .

  2. ISL2: Develop high-resolution mapping tools for neurodegenerative disease models.

Product Specs

Buffer
Preservative: 0.03% ProClin 300; Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
14-16 week lead time (made-to-order)
Synonyms
IDL2 antibody; At5g64667 antibody; MUB3 antibody; Protein IDA-LIKE 2 antibody
Target Names
IDL2
Uniprot No.

Target Background

Function
Putative involvement in floral abscission.
Database Links

KEGG: ath:AT5G64667

STRING: 3702.AT5G64667.1

UniGene: At.69490

Subcellular Location
Secreted, extracellular space.
Tissue Specificity
Expressed in leaves, buds, flowers, seedlings and seeds. Detected at the base of pedicel, in the floral and funicule abscission zones and in vascular tissues.

Q&A

What is IDL2 Antibody and what is its primary research application?

IDL2 Antibody is a research reagent that targets Protein IDA-LIKE 2 (also known as At5g64667 or MUB3), which appears to be associated with Arabidopsis thaliana based on KEGG pathway annotations. As with other research antibodies, its primary applications likely include Western blotting, immunohistochemistry, flow cytometry, and ELISA. When working with any research antibody, validation of specificity is critical, as studies indicate approximately 20% of commercial antibodies fail specificity tests.

How should IDL2 Antibody be stored and handled to maintain optimal activity?

While specific storage information for IDL2 Antibody isn't provided in the search results, research-grade antibodies typically require careful handling. Most antibodies are supplied in liquid form and should be stored at -20°C for long-term storage or at 4°C for short-term use. Avoid repeated freeze-thaw cycles as this can compromise antibody functionality. Always centrifuge briefly before opening the vial to ensure all liquid is at the bottom of the container.

What validation methods should be used to confirm IDL2 Antibody specificity?

Rigorous validation is essential for all research antibodies. Standard validation methods include:

  • Western blot analysis to confirm binding to target proteins of expected molecular weight

  • ELISA with competing antigens to demonstrate specificity

  • Immunoprecipitation followed by mass spectrometry

  • Use of knockout/knockdown models as negative controls

  • Cross-reactivity testing across species if applicable

This multi-method approach helps ensure the observed signals are truly attributable to the target protein rather than non-specific binding.

How should controls be designed for experiments using IDL2 Antibody?

Proper experimental controls are critical when working with antibodies. For IDL2 Antibody experiments, researchers should implement:

  • Positive controls: Known samples containing the target protein

  • Negative controls:

    • Primary antibody omission

    • Isotype controls (non-specific antibodies of the same isotype)

    • Ideally, samples from knockout models lacking the target protein

  • Blocking peptide controls: Pre-incubation of the antibody with its target peptide

These controls help distinguish specific from non-specific signals and validate experimental results .

What are the recommended dilutions and incubation conditions for different applications?

While specific recommendations for IDL2 Antibody aren't provided in the search results, researchers should:

  • Start with manufacturer-recommended dilutions for each application (Western blot, immunohistochemistry, flow cytometry)

  • Optimize through titration experiments for your specific samples

  • Consider these typical ranges for antibody applications:

    • Western blot: 1:500-1:5000

    • Immunohistochemistry: 1:50-1:500

    • Flow cytometry: 1:50-1:200

    • ELISA: 1:1000-1:30,000

Incubation time and temperature also require optimization, with typical conditions being 1-2 hours at room temperature or overnight at 4°C.

How can IDL2 Antibody be used for co-immunoprecipitation studies?

For co-immunoprecipitation (Co-IP) studies with IDL2 Antibody:

  • Lysate preparation: Use gentle lysis buffers that preserve protein-protein interactions

  • Pre-clearing: Incubate lysate with protein A/G beads to reduce non-specific binding

  • Antibody binding: Incubate pre-cleared lysate with IDL2 Antibody (typically 2-5 μg antibody per mg of protein)

  • Immunoprecipitation: Add protein A/G beads to capture antibody-protein complexes

  • Washing: Perform stringent washes to remove non-specifically bound proteins

  • Elution and analysis: Elute bound proteins and analyze by Western blot or mass spectrometry

This approach can help identify protein interaction partners of IDL2, potentially revealing functional relationships .

What considerations are important when using IDL2 Antibody for flow cytometry?

When adapting antibodies for flow cytometry applications:

  • Cell preparation: Proper fixation and permeabilization are critical, especially for intracellular targets

  • Buffer optimization: Different antibodies perform optimally in specific buffer systems; for instance, some researchers report improved results using Foxp3 buffer systems for certain intracellular targets

  • Concentration optimization: Titrate antibody to determine optimal signal-to-noise ratio

  • Fluorophore selection: Consider spectral overlap with other markers in your panel

  • Controls: Include fluorescence-minus-one (FMO) controls for accurate gating

A methodical approach to protocol optimization can significantly improve detection sensitivity and specificity.

What are common causes of false positive or false negative results with IDL2 Antibody?

IssuePotential CausesSolutions
False positivesCross-reactivity with similar epitopesValidate specificity with multiple methods including knockout controls
Non-specific binding to Fc receptorsInclude Fc receptor blocking step
Excessive antibody concentrationTitrate to determine optimal concentration
False negativesEpitope masking due to protein modificationsTry multiple antibodies targeting different epitopes
Insufficient antigen retrievalOptimize antigen retrieval methods
Target protein denaturationAdjust fixation and extraction conditions
Low antibody sensitivityConsider signal amplification methods

Comprehensive troubleshooting requires systematic evaluation of each experimental step .

How can researchers enhance signal detection when working with low-abundance targets?

For detecting low-abundance targets with IDL2 Antibody:

  • Signal amplification systems:

    • Tyramide signal amplification (TSA)

    • Polymer-based detection systems

    • Biotin-streptavidin amplification

  • Enhanced sample preparation:

    • Immunoprecipitation before Western blotting

    • Subcellular fractionation to concentrate target proteins

  • Sensitive detection methods:

    • Chemiluminescence with extended exposure times

    • Fluorescence with appropriate filters and high-sensitivity cameras

  • Optimized blocking conditions:

    • Test different blocking agents (BSA, milk, serum)

    • Adjust blocking duration and temperature

These approaches can significantly improve detection sensitivity while maintaining specificity.

How should researchers quantitatively analyze Western blot data generated with IDL2 Antibody?

For rigorous quantitative analysis of Western blot data:

  • Image acquisition:

    • Capture images within the linear range of detection

    • Use appropriate exposure settings to avoid saturation

  • Normalization strategies:

    • Always include loading controls (β-actin, GAPDH, tubulin)

    • Calculate relative expression as ratio of target to loading control

  • Software analysis:

    • Use dedicated analysis software (ImageJ, Image Lab)

    • Define lanes and bands consistently across all samples

  • Statistical analysis:

    • Perform replicate experiments (minimum n=3)

    • Apply appropriate statistical tests based on data distribution

This systematic approach ensures reliable quantification of protein expression differences.

What criteria should be used to determine antibody specificity in experimental validation?

Rigorous antibody validation requires multiple complementary approaches:

  • Western blot criteria:

    • Single band at expected molecular weight

    • Band disappearance in knockout/knockdown samples

    • Band competition with immunizing peptide

  • Immunohistochemistry criteria:

    • Expected cellular/subcellular localization

    • Absence of signal in negative controls

    • Consistent pattern across different fixation methods

  • Flow cytometry criteria:

    • Cell population-specific staining patterns

    • Correlation with known expression patterns

    • Comparison with alternative antibody clones

Meeting these criteria across multiple validation approaches provides strong evidence for antibody specificity .

How does working with plant protein antibodies like IDL2 differ from mammalian antibodies?

Working with plant protein antibodies presents distinct challenges compared to mammalian systems:

  • Cross-reactivity considerations:

    • Plant proteins often have specific post-translational modifications

    • Secondary metabolites may interfere with antibody binding

    • Cell wall components can cause high background

  • Extraction methods:

    • Plant tissues require specialized extraction buffers to deal with cell walls

    • Presence of phenolic compounds may necessitate additional extraction steps

    • Protein denaturation protocols often need optimization

  • Validation challenges:

    • Fewer available knockout lines for negative controls

    • Limited commercial antibodies targeting plant proteins

    • Higher potential for non-specific binding

These differences require adaptation of standard immunological techniques when working with plant protein antibodies.

How can researchers compare the performance of different antibody clones targeting the same protein?

When evaluating multiple antibody clones:

ParameterAssessment MethodAcceptance Criteria
SpecificityWestern blot with positive and negative controlsSingle band at expected molecular weight; absence in negative controls
SensitivityTitration experiments with known quantities of targetLowest concentration reliably detected
Signal-to-noise ratioCompare specific signal to backgroundHigher ratio indicates better performance
Epitope recognitionPeptide blocking, truncation mutantsIdentify specific binding regions
ReproducibilityIndependent replicatesConsistent results across experiments
Cross-reactivityTesting across related proteins/speciesMinimal off-target binding

This systematic comparison helps identify the optimal antibody for specific research applications.

What emerging technologies might enhance the utility of IDL2 Antibody in research?

Several cutting-edge technologies could expand IDL2 Antibody applications:

  • Proximity labeling approaches:

    • BioID or APEX2 fusions to identify proximal proteins

    • Allows mapping of spatial protein networks

  • Single-cell applications:

    • Antibody-based single-cell proteomics

    • Spatial proteomics with multiplexed antibody detection

  • Engineered antibody formats:

    • Single-domain antibodies for improved penetration

    • Bi-specific antibodies for co-localization studies

  • Live-cell imaging applications:

    • Cell-permeable antibody fragments

    • Antibody-fluorescent protein fusions

These technologies could provide unprecedented insights into IDL2 protein function and interactions .

How might CRISPR-based approaches complement antibody-based detection of IDL2?

CRISPR technologies offer powerful complementary approaches to antibody-based research:

  • Endogenous tagging:

    • Knock-in of epitope tags for antibody-independent detection

    • Fluorescent protein fusions for live-cell imaging

  • Validation resources:

    • Generation of knockout cell lines as definitive negative controls

    • Creation of isogenic cell lines with varying expression levels

  • Functional studies:

    • CRISPRi/CRISPRa for modulating expression without protein modification

    • Domain-specific mutations to probe structure-function relationships

  • Proteomic applications:

    • CRISPR screens combined with antibody-based readouts

    • Proximity-dependent labeling with engineered CRISPR systems

Integrating CRISPR and antibody approaches provides both complementary data and critical validation tools.

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