Period1 is a reported alias of the human protein 'period circadian regulator 1', encoded by the gene PER1. Anti-Period1 antibodies are available from several suppliers. The full protein is reported to be 1290 amino acid residues in length. Based on antigen name, there may be yeast, 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.