PTB is a reported alias of the human protein 'polypyrimidine tract binding protein 1', encoded by the gene PTBP1. Anti-PTB antibodies are available from several suppliers. The full protein is reported to be 531 amino acid residues in length. Based on antigen name, there may be 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.