3.1.4.38	lysophosphatidylcholine + H2O	-	
3.1.4.38	lysosphingomyelin + H2O	best substrate of the soluble isozyme sGPC-Cpde	
3.1.4.38	sn-glycero-3-phosphocholine + H2O	-	
3.1.4.38	sn-glycero-3-phosphocholine + H2O	the choline moiety of glycero-3-phosphocholine is incorporated into phosphocholine in an ENPP6-dependent manner both in vivo and in vitro