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Schematic pathways of sphingolipids metabolism. CDase: ceramidase; S1P lyase: sphingosine-1-phosphate lyase; S1P phosphatase: sphingosine-1-phosphate phosphatase; SMase: sphingomyelinase; SMS: sphingomyelin synthase; SPHK: sphingosine kinase; SPT: serine palmitoyl transferase.
