Anti-C1R antibodies are used in the immunodetection of the protein complement C1r. In humans, the canonical protein has a reported length of 705 amino acid residues and a mass of 80.1 kDa. It has been described to be a secreted protein. A member of the Peptidase S1 protein family, C1R is known to be involved with immune response pathways and innate immune responses. Post-translational modifications have been described, including glycosylation. The C1R gene has been associated with the disease, Ehlers-Danlos syndrome. Synonyms for this target antigen include EDSPD1, complement C1r subcomponent, complement component 1, r subcomponent, and EDS8. C1R gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. A number of C1R antibodies have been mentioned in research publications and have associated citations. These antibodies are most commonly used in Western Blot experiments, among other applications.