3-ketodihydrosphingosine reductase MLLLAAAFLV AFVLLLYMVS PLISPKPLAL PGAHVVVTGG SSGIGKCIAI ECYKQGAFIT LVARNEDKLL QAKKEIEMHS INDKQVVLCI SVDVSQDYNQ VENVIKQAQE KLGPVDMLVN CAGMAVSGKF EDLERLMSIN YLGSVYPSRA VITTM