MAC387 is a reported alias of the human protein 'S100 calcium binding protein A9', encoded by the gene S100A9. Anti-MAC387 antibodies are available from several suppliers. The full protein is reported to be 114 amino acid residues in length. Based on antigen name, there may be canine, porcine, monkey, mouse and rat variants of this protein. See the antibody supplier page for important details, including specific immunogenicity and validated applications.