Immunogen sequence: GDDLSTLTGK NVLIVEDIID TGKTMQTLLS LVRQYNPKMV KVASLLVKRT PRSVGYKPDF VGFEIPDKFV VGYALDYNEY FRDLNHVCVI SETGKAKYKA. The protein is a transferase, which catalyzes conversion of hypoxanthine to inosine monophosphate and guanine to guanosine