P40-3 is a reported alias of the human protein 'ribosomal protein SA', encoded by the gene RPSA. Anti-P40-3 antibodies are available from several suppliers. The full protein is reported to be 295 amino acid residues in length. Based on antigen name, there may be E. coli, plant, canine, porcine, monkey, mouse and rat variants of this protein. See the antibody supplier page for important details, including specific immunogenicity and validated applications.