Anti-coatomer protein complex, subunit alpha antibodies enable researchers to detect and measure the coatomer protein complex, subunit alpha antigen in biological samples. This target is a reported synonym of the COPA gene, which encodes COPI coat complex subunit alpha. This protein is known to function in Golgi transport and intracellular protein transport, among other biological roles. The human version of coatomer protein complex, subunit alpha has a canonical amino acid length of 1224 residues and a protein mass of 138.3 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the membrane, cytoplasmic vesicles, Golgi, and cytoplasm of cells and widely expressed in many tissue types. Other names for this target antigen include AILJK, HEP-COP, and alpha-COP.