411 REFERENCE · Wikibooks
Saylor.org's Cell Biology/Lipid-Derived Secondary Messengers
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You should know the following important classes of lipid-derived secondary messengers: phosphatidylinositol (PI), phosphatidylcholine (PC), and sphingomyelin. Each of these classes has its own set of messengers. The PI class, for example, includes inositol triphosphate (IP3) and diacylglycerol (DAG), among others.