Fig. 1From: Cell surface sphingomyelin: key role in cancer initiation, progression, and immune evasionMajor steps in sphingomyelin metabolism. SMS, sphingomyelin synthase; SMase, sphingomyelinase; CS, ceramide synthase; CDase, ceramidase; S1PP, sphingosine-1-phosphate phosphatidase; SK, sphingosine kinase; S1P, sphingosine 1-phosphateBack to article page