ELISA kits for the study of the target, C3a are available in ready-to-use formats. The protein is also known as complement C3 or C3. It is a 1663-residue protein with a secreted localization. Other alias names for this target include: epididymis secretory sperm binding protein Li 62p, complement component C3b, complement component 3, acylation-stimulating protein cleavage product, C3a anaphylatoxin, C3 PZP-like alpha-2-macroglobulin domain-containing protein 1, and AHUS5.