col-99 Antibody
Product Specs
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Target Background
- COL-99 polypeptide, a membrane-associated collagen with interrupted triple-helices, has a molecular weight of 85 kDa and forms a trimeric protein. COL-99 is localized to the plasma membrane and undergoes furin-dependent ectodomain cleavage and shedding. COL-99 is detected in the mouth, pharynx, body wall, and tail, primarily in motor neurons and muscle systems. It is particularly enriched at neuromuscular junctions. PMID: 26667623
STRING: 6239.F29C4.8b
UniGene: Cel.13043
Q&A
Advanced Data Interpretation
2. Resolving contradictory results between Western blot and ELISA assays
Scenario: Antibody shows strong ELISA signal (OD450=2.1) but weak Western blot band (<10% intensity vs control)
| Potential Cause | Diagnostic Test | |
|---|---|---|
| Epitope masking | Conformational vs linear epitopes | Limited proteolysis + epitope mapping |
| Cross-reactivity | Non-specific binding | Knockout cell line validation |
| Buffer incompatibility | Detergent interference | Alternative lysis buffers (CHAPS vs NP-40) |
Functional Characterization
3. Methodology for determining antibody-dependent cellular phagocytosis (ADCP)
Protocol refinement:
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Effector cells: Use primary human macrophages (donor-matched) vs THP-1 cell line
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Target ratio: Optimize effector:target cell ratios (10:1 to 50:1)
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Validation controls:
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Fc receptor blocking (anti-CD16/32)
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Isotype control (human IgG1κ)
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Data normalization: Express as phagocytic score = (% positive cells) × (mean fluorescence intensity)
Basic vs Advanced Questions
Basic Research Question: "Which host system produces functional col-99 antibody with proper glycosylation?"
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Answer framework: Compare HEK293 (human glycosylation) vs CHO (scalability) systems using PNGase F treatment and lectin blotting
Advanced Research Question: "How to engineer col-99 antibody variants with pH-dependent antigen binding for improved tumor penetration?"
