The Human 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 Human Complement Component C3a Antibody has been shown to work in the following applications: EIA, Immunoassay, ELISA, Immunocytochemistry, and Western Blot.