Immunogen sequence: LITLETQDGY FSHRPKEKVR TDSNNENSVP KDFENVDNSN FAPRTQKQKH QPELAKKPPS RQKELLKRKL EQQEKGKGHT FPGKGPGEVL PPGDRAAANS SHGKDVSRP Highest antigen sequence identity to the following orthologs: Mouse - 82%, Rat - 75%. Catalyzes the first step in