A-SMase Smpd1 + aSMase|ASM|Zn-SMase|A-SMase|acid sphingomyelinase acid sphingomyelinase ASM http://identifiers.org/mgd/MGI:98325 Zn-SMase aSMase protein coding gene Gene genetic mapping MGI:98325 O sphingomyelin phosphodiesterase 1, acid lysosomal