Immunogen sequence: MADSELQLVE QRIRSFPDFP TPGVVFRDIS PVLKDPASFR AAIGLLARHL KATHGGRIDY IAGD Highest antigen sequence identity to the following orthologs: Mouse - 73%, Rat - 78%. Adenine phosphoribosyltransferase belongs to the purine/pyrimidine phosphorib