The Complement Component C3a Antibody from R&D Systems, a Bio-Techne Brand is a Goat Polyclonal antibody to C3, and complement C3. This antibody recognizes Homo Sapiens, and Human antigen. The Complement Component C3a Antibody has been shown to work in the following applications: EIA, Immunoassay, ELISA, Immunocytochemistry, and Western Blot.