Ceramide synthase 4 MLSSFNEWFW QDRFWLPPNV TWTELEDRDG RVYPHPQDLL AALPLALVLL AMRLAFERFI GLPLSRWLGV RDQTRRQVKP NATLEKHFLT EGHRPKEPQL SLLAAQCGLT LQQTQRWFRR RRNQDRPQLT KKFCEASWRF LFYLSSFVGG LSVLYHESWL WAPVMCWDRY PNQTLKPSLY WWYLLELGFY LS