Immunogen sequence: GFTAYSASKF AIRGLAEALQ MEVKPYNVYI TVAYPPDTDT PGFAEENRTK PLETRLISET TSVCKPEQVA KQIVKDAIQG NFNSSLGSDG YMLSALTCGM APVTSITEGL QQVVTMGLFR TIALFYL. The protein encoded by this gene catalyzes the reduction of 3-ketodihydrosphingosine to dihyd