Formalin-fixed, paraffin-embedded human Kidney stained with C1QA Mouse Monoclonal Antibody (C1QA/2956).
Formalin-fixed, paraffin-embedded human Liver stained with C1QA Mouse Monoclonal Antibody (C1QA/2956).
SDS-PAGE Analysis Purified C1QA Mouse Monoclonal Antibody (C1QA/2956). Confirmation of Purity and Integrity of Antibody.
Analysis of Protein Array containing more than 19,000 full-length human proteins using C1QA Mouse Monoclonal Antibody (C1QA/2956).
Known Applications & Suggested Dilutions
Host / Ig Isotype
Mol. Weight of Antigen
Specificity & Comments
C1q, a subcomponent of the classical complement pathway, is composed of nine subunits that mediate classical complement activation and thereby play an important role in the immune response. Six of these subunits are disulfide-linked dimers of chains A and B, while three of these subunits, designated C1q-A through C1q-C, are disulfide-linked dimers of chain C. Each chain contains an N-terminal collagen-like region and a C-terminal C1q globular domain. The presence of receptors for C1q on effector cells modulates its activity, which may be antibody-dependent or independent. Macrophages are the primary source of C1q, while anti-inflammatory drugs as well as cytokines differentially regulate expression of the mRNA as well as the protein. C1q deficiency is associated with lupus erythematosus and glomerulonephritis.