Immunogen sequence: IGHTRYATTG KCELENCQPF VVETLHGKIA VAHNGELVNA ARLRKKLLRH GIGLSTSSDS EMITQLLAYT PPQEQDDTPD WVARIKNLMK EAPTA. The protein encoded by this gene is a member of the purine/pyrimidine phosphoribosyltransferase family. This protein is a regula