SPAC24B11.12c Antibody

What is SPAC24B11.12c and in which organism is it found?

SPAC24B11.12c is a protein found in Schizosaccharomyces pombe (fission yeast), specifically in strain 972 / ATCC 24843. The protein is identified by the UniProt accession number Q09891 . S. pombe is a well-established model organism in molecular and cellular biology research, particularly valued for studying cell cycle regulation, DNA repair mechanisms, and chromosome dynamics. The SPAC24B11.12c antibody has been developed specifically to target this protein for research applications in this important model organism.

What primary applications is SPAC24B11.12c antibody validated for?

The SPAC24B11.12c antibody has been validated for several research applications, primarily Enzyme-Linked Immunosorbent Assay (ELISA) and Western Blotting (WB) . These techniques allow researchers to detect and quantify the SPAC24B11.12c protein in various experimental contexts. For Western blotting, the antibody enables identification of the antigen in complex biological samples, making it a valuable tool for studying protein expression, modification states, and molecular weight verification. For ELISA applications, the antibody facilitates quantitative analysis of protein levels across different experimental conditions.

What are the optimal storage conditions for SPAC24B11.12c antibody?

For maintaining optimal reactivity and stability, the SPAC24B11.12c antibody should be stored at -20°C or -80°C upon receipt . Repeated freeze-thaw cycles should be avoided as they can compromise antibody functionality through protein denaturation and aggregation. The antibody is supplied in a liquid form with a storage buffer containing 50% glycerol, 0.01M PBS (pH 7.4), and 0.03% Proclin 300 as a preservative . This formulation helps maintain stability during storage while preventing microbial contamination. For working solutions, storage at 4°C for up to one week is generally acceptable, but longer-term storage requires returning to freezing conditions.

How is the SPAC24B11.12c antibody produced and purified?

The SPAC24B11.12c antibody is a polyclonal antibody raised in rabbits immunized with recombinant Schizosaccharomyces pombe (strain 972 / ATCC 24843) SPAC24B11.12c protein . After immunization and serum collection, the antibody undergoes antigen affinity purification , which selectively isolates antibodies that specifically bind to the SPAC24B11.12c protein. This purification method enhances specificity by removing antibodies that might cross-react with other proteins, thus reducing background signal in experimental applications. The resulting polyclonal preparation contains antibodies recognizing multiple epitopes on the target protein, which can provide robust detection across different experimental conditions.

What strategies can be employed to validate SPAC24B11.12c antibody specificity in S. pombe studies?

Validating antibody specificity is crucial for ensuring reliable experimental results. For SPAC24B11.12c antibody, multiple complementary approaches should be considered:

• Genetic validation: Using SPAC24B11.12c deletion strains as negative controls in Western blot or immunofluorescence experiments. The absence of signal in these strains would confirm antibody specificity.

• Recombinant protein controls: Testing the antibody against purified recombinant SPAC24B11.12c protein alongside other S. pombe proteins to assess cross-reactivity.

• Epitope mapping: Determining the specific region of SPAC24B11.12c recognized by the antibody to predict potential cross-reactivity with related proteins.

• Preabsorption controls: Pre-incubating the antibody with excess recombinant SPAC24B11.12c before immunostaining or Western blotting. This should eliminate specific signals if the antibody is truly specific.

• Mass spectrometry validation: Performing immunoprecipitation followed by mass spectrometry to identify all proteins captured by the antibody, confirming SPAC24B11.12c as the primary target.

How can SPAC24B11.12c antibody be integrated with the POMBOX cloning toolkit for advanced studies?

The POMBOX molecular cloning toolkit facilitates fast, efficient, and modular construction of genetic circuits in S. pombe . Integrating SPAC24B11.12c antibody with this toolkit offers several research advantages:

• Expression verification: The antibody can be used to confirm successful expression of SPAC24B11.12c fusion proteins or modified variants generated using the POMBOX toolkit.

• Quantitative analysis: When combining genetic modifications made with POMBOX, the antibody enables quantification of SPAC24B11.12c expression levels under different genetic constructs or conditions.

• Localization studies: By using the antibody in immunofluorescence microscopy, researchers can determine the subcellular localization of native or modified SPAC24B11.12c protein in strains engineered with POMBOX.

• Protein-protein interaction verification: In synthetic biology applications, the antibody can help validate new protein-protein interactions designed through POMBOX genetic circuits by co-immunoprecipitation followed by Western blotting.

• Pathway analysis: When POMBOX is used to manipulate metabolic pathways, such as those producing methylxanthine, amorpha-4,11-diene, or cinnamic acid , the antibody can help track SPAC24B11.12c involvement in these engineered pathways.

What troubleshooting approaches are recommended when SPAC24B11.12c antibody shows inconsistent results in Western blot applications?

Inconsistent Western blot results can stem from multiple factors. Consider these methodological solutions:

• Sample preparation optimization:

  • Ensure complete cell lysis using appropriate buffers for yeast cells (containing zymolyase or mechanical disruption)

  • Include protease inhibitors to prevent protein degradation

  • Standardize protein quantification methods and loading amounts

• Blocking and washing optimization:

  • Test different blocking agents (BSA vs. non-fat dry milk) at varying concentrations

  • Increase washing duration or detergent concentration to reduce background

  • Optimize antibody dilution (typically starting at 1:1000 and adjusting as needed)

• Transfer efficiency verification:

  • Confirm protein transfer using reversible staining methods like Ponceau S

  • Adjust transfer conditions (time, voltage, buffer composition) for the molecular weight of SPAC24B11.12c

• Detection system evaluation:

  • Compare chemiluminescent, fluorescent, and colorimetric detection methods

  • Ensure secondary antibody compatibility and freshness

  • Optimize exposure times or scanner settings

• Antibody handling assessment:

  • Avoid repeated freeze-thaw cycles

  • Prepare fresh working dilutions for each experiment

  • Add sodium azide (0.02%) to antibody dilutions for extended storage

How can SPAC24B11.12c antibody be optimized for immunoprecipitation to study protein-protein interactions in S. pombe?

Optimizing immunoprecipitation (IP) with SPAC24B11.12c antibody requires careful consideration of experimental conditions:

• Lysate preparation:

  • Use gentle lysis buffers that preserve protein-protein interactions (e.g., 20mM HEPES pH 7.4, 150mM NaCl, 0.5% NP-40)

  • Include appropriate protease and phosphatase inhibitors

  • Optimize cell disruption methods specific for S. pombe's rigid cell wall

• Antibody coupling strategies:

  • Direct coupling to protein A/G beads versus pre-forming antibody-antigen complexes

  • Covalent cross-linking of antibody to beads to prevent antibody contamination in eluates

  • Determining optimal antibody-to-bead ratio (typically 2-10 μg antibody per 50 μl bead slurry)

• Washing conditions:

  • Balance stringency (to reduce non-specific binding) with maintaining genuine interactions

  • Consider sequential washes with decreasing salt concentrations

  • Test detergent types and concentrations (RIPA versus milder NP-40 or Triton X-100)

• Elution methods:

  • Compare competitive elution with epitope peptides versus denaturing conditions

  • Evaluate low-pH glycine buffers versus SDS sample buffer for elution efficiency

  • Consider on-bead digestion for direct mass spectrometry analysis

• Controls:

  • Include IgG isotype controls from non-immunized rabbits

  • Perform IPs in SPAC24B11.12c deletion strains

  • Use blocking peptides to confirm specificity

How should experiments be designed to study SPAC24B11.12c protein dynamics during the S. pombe cell cycle?

Studying protein dynamics throughout the cell cycle requires integrating multiple approaches:

• Synchronization methods:

  • Comparing nitrogen starvation, hydroxyurea block, and temperature-sensitive cdc mutants

  • Evaluating the impact of synchronization method on SPAC24B11.12c expression or modification

  • Optimizing sampling intervals based on S. pombe cell cycle duration (2-4 hours)

• Time-course experimental design:

  • Protein level quantification at defined intervals (typically 15-30 minutes)

  • Parallel sampling for RNA extraction to correlate transcription with protein levels

  • Live-cell imaging with tagged constructs to complement antibody-based fixed-cell approaches

• Cell cycle markers:

  • Co-immunostaining with known cell cycle phase markers

  • DNA content analysis by flow cytometry

  • Morphological assessment of septation index

• Quantification approaches:

  • Western blot densitometry with normalization to loading controls

  • Single-cell analysis by immunofluorescence to capture cell-to-cell variation

  • Application of statistical methods appropriate for time-series data

• Perturbation studies:

  • Effect of cell cycle inhibitors on SPAC24B11.12c levels or localization

  • Response to DNA damage or replication stress

  • Genetic interactions with key cell cycle regulators

Table 1: Sample collection timing for S. pombe cell cycle analysis

What methods are recommended for using SPAC24B11.12c antibody in quantitative proteomics workflows?

Integrating antibody-based methods with quantitative proteomics requires specific considerations:

• Immunoprecipitation-mass spectrometry (IP-MS):

  • Optimizing antibody coupling to beads to minimize contamination

  • Incorporating SILAC or TMT labeling for quantitative comparisons

  • Developing appropriate negative controls for background subtraction

• Sample preparation optimization:

  • Evaluating different extraction methods for maximum protein recovery

  • Determining compatible detergents for both antibody binding and MS analysis

  • Developing fractionation strategies for complex samples

• Data acquisition approaches:

  • Selecting between data-dependent and data-independent acquisition methods

  • Optimizing MS parameters for SPAC24B11.12c peptide detection

  • Developing targeted methods for specific SPAC24B11.12c peptides

• Quantification strategies:

  • Label-free versus isotope labeling approaches

  • Absolute quantification using synthesized peptide standards

  • Statistical methods for determining significant changes

• Validation of results:

  • Orthogonal verification of key findings with alternative methods

  • Biological replication requirements for statistical confidence

  • Integration with other proteomics datasets

How can SPAC24B11.12c antibody be incorporated into synthetic biology applications using the POMBOX toolkit?

The POMBOX toolkit enables construction of complex genetic circuits in S. pombe . The SPAC24B11.12c antibody can be strategically incorporated into synthetic biology workflows:

• Circuit characterization:

  • Quantifying expression levels of SPAC24B11.12c fusions in synthetic circuits

  • Assessing protein stability under different induction conditions

  • Correlating protein levels with circuit output metrics

• Metabolic engineering applications:

  • Monitoring SPAC24B11.12c involvement in engineered metabolic pathways

  • Quantifying expression levels in strains engineered to produce specialized metabolites like methylxanthine, amorpha-4,11-diene, or cinnamic acid

  • Assessing protein-protein interactions in synthetic metabolic complexes

• Localization engineering:

  • Verifying subcellular targeting of SPAC24B11.12c fusion proteins

  • Assessing the impact of localization signals on protein function

  • Quantifying protein distribution across cellular compartments

• Protein modification analysis:

  • Detecting post-translational modifications in engineered variants

  • Assessing the impact of mutations on protein stability

  • Comparing expression levels between wild-type and engineered forms

• Strain validation:

  • Confirming genetic modifications through protein expression verification

  • Assessing variability in expression across clonal populations

  • Monitoring expression stability over multiple generations

How should researchers interpret contradictory results between SPAC24B11.12c antibody-based detection and mRNA expression data?

Discrepancies between protein and mRNA levels are common and can provide biological insights:

• Technical considerations:

  • Antibody specificity verification with appropriate controls

  • Assessing detection sensitivity limits relative to transcript abundance

  • Evaluating extraction efficiency for different sample types

• Biological explanations:

  • Post-transcriptional regulation mechanisms (miRNA, RNA binding proteins)

  • Protein stability and degradation pathway activity

  • Translational efficiency differences across conditions

• Experimental follow-up approaches:

  • Polysome profiling to assess translational status

  • Protein degradation rate measurement with cycloheximide chase

  • Assessment of post-translational modifications affecting antibody recognition

• Computational integration:

  • Temporal analysis accounting for delays between transcription and translation

  • Mathematical modeling of protein production and degradation rates

  • Multi-omics data integration approaches

• Experimental design improvements:

  • Time-course analysis with higher temporal resolution

  • Subcellular fractionation to identify sequestered protein pools

  • Analysis of protein complex formation affecting epitope accessibility

What quality control metrics should be established when using SPAC24B11.12c antibody across multiple experiments?

Establishing robust quality control procedures ensures reproducibility:

• Antibody performance tracking:

  • Lot-to-lot variation monitoring with standard samples

  • Sensitivity drift assessment over time

  • Periodic specificity confirmation with knockout controls

• Quantitative standards:

  • Inclusion of calibration curves in every experiment

  • Use of consistent positive and negative controls

  • Internal reference samples across experimental batches

• Technical parameters:

  • Signal-to-noise ratio documentation

  • Dynamic range verification

  • Lower limit of detection determination

• Documentation requirements:

  • Detailed protocol recording including all buffer compositions

  • Image acquisition settings for microscopy or blot imaging

  • Raw data preservation for reanalysis

• Statistical approaches:

  • Power analysis for sample size determination

  • Appropriate statistical tests for different data types

  • Multiple testing correction for large-scale experiments

How can SPAC24B11.12c antibody data be integrated with other omics datasets for systems biology approaches?

Multi-omics integration enhances biological insights:

• Correlation analysis approaches:

  • Timepoint matching between protein, transcript, and metabolite data

  • Accounting for temporal delays in biological processes

  • Statistical methods for multi-dimensional data correlation

• Network reconstruction:

  • Integration of protein-protein interaction data with expression changes

  • Pathway enrichment analysis incorporating antibody-derived data

  • Causal network inference combining multiple data types

• Data normalization considerations:

  • Platform-specific normalization before integration

  • Batch effect correction across experiments

  • Transformation approaches for combining disparate data types

• Visualization strategies:

  • Multi-omics data overlays on pathway maps

  • Heatmap clustering with multiple data types

  • Dimension reduction techniques for integrated datasets

• Validation approaches:

  • Hypothesis testing based on integrated models

  • Targeted experiments to confirm computationally derived relationships

  • Independent data collection for model validation

How does the methodological approach for using SPAC24B11.12c antibody compare with modern epitope tagging strategies?

Comparing antibody-based detection with epitope tagging provides complementary insights:

• Advantages of SPAC24B11.12c antibody approach:

  • Detects native protein without genetic modification

  • Avoids potential artifacts from protein tagging

  • Compatible with natural promoter regulation

  • Detects both endogenous and ectopically expressed protein

• Advantages of epitope tagging:

  • Highly specific detection with validated tag antibodies

  • Consistent performance across different proteins

  • Enables purification with standardized protocols

  • Facilitates multiplexing with different tags

• Experimental design considerations:

  • Using both approaches as complementary validation

  • Confirming tag impact on protein function

  • Determining whether the antibody recognizes the tagged version

• Method selection criteria:

  • Research question specificity

  • Available genetic tools and expertise

  • Required sensitivity and specificity

  • Downstream application compatibility

• Combined approach strategies:

  • Validation of SPAC24B11.12c antibody using tagged strains

  • Using tag antibodies as positive controls

  • Dual detection for quantification confidence