Mouse anti Human iC3b (Neoantigen) antibody, clone 013III-1.16 recognizes the ~42 kDa human inactive complement component 3b (iC3b) neoantigen present in blood serum. Cleavage of C3b into iC3b by the protease factor I, in the presence of cofactors, changes the structure and resulting binding properties, preventing binding by complement factor B and properdin. This prevents further progression of the complement pathway, providing another mechanism by which the complement pathway may be regulated.
iC3b is thought to play a role in inducing tolerance, binding complement receptor type 3 on antigen presenting cells and stimulating them to produce transforming growth factor beta2 and interleukin-10. It is thought to stimulate B-cells via the CD21 receptor providing a link between the innate and adaptive immune responses. Additionally iC3b acts as an opsonin which is recognised by complement receptor 3 expressed on leukocytes or complement receptor of the immunoglobulin superfamily (CRIg) on Kupffer cells, stimulating phagocytosis of the tagged cells. iC3b levels are often elevated in diseases such as Systemic Lupus Erythematosis and Rheumatoid arthritis.
iC3b levels are often elevated in diseases such as Systemic Lupus Erythematosis and Rheumatoid arthritis.
- Target Species
- Product Form
- Purified IgG - liquid
- Purified IgG prepared by affinity chromatography on Protein A
- Buffer Solution
- Borate buffered saline
- Preservative Stabilisers
- 0.09% Sodium Azide (NaN3)
- Purified human iC3b
- Approx. Protein Concentrations
- IgG concentration 1.0mg/ml
- Store at +4oC or at -20oC if preferred.
Storage in frost-free freezers is not recommended.
This product should be stored undiluted. Avoid repeated freezing and thawing as this may denature the antibody. Should this product contain a precipitate we recommend microcentrifugation before use.
- 18 months from date of despatch.
- Entrez Gene
- GO Terms
endopeptidase inhibitor activity
complement activation, alternative pathway
complement activation, classical pathway
G-protein coupled receptor protein signaling pathway
positive regulation vascular endothelial growth factor production
- For research purposes only
This product has been reported to work in the following applications. This information is derived from testing within our laboratories, peer-reviewed publications or personal communications from the originators. Please refer to references indicated for further information. For general protocol recommendations, please visit the antibody protocols page.
Applications of iC3b antibody
|Immunohistology - Frozen
|Immunohistology - Paraffin
Where this product has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own system using appropriate negative/positive controls.
- Histology Positive Control Tissue
- Kidney from post streptoccal glomerulonephritis patients
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Secondary Antibodies Available
Negative Isotype Controls Available
Useful Reagents Available
Product Specific References
Janssena, B. et al. (2007) Structural insights into the central complement component C3.
Molecular Immunology. 44: 3-10.
Bergmann-Leitner, E.S. et al. (2006) Complement 3d: from molecular adjuvant to target of immune escape mechanisms.
Clin Immunol. 121 (2): 177-85.
Sohn, J.H. et al. (2003) Tolerance is dependent on complement C3 fragment iC3b binding to antigen-presenting cells.
Nat Med. 9 (2): 206-12.