Diacylglycerol's affair with protein kinase C turns 25

This year marks the 25-year anniversary of the discovery by Nishizuka and co-workers that diacylglycerol activates the ubiquitous signal transducer protein kinase C. This discovery placed the lipid second messenger-protein kinase C signaling pathway center stage alongside the cAMP-protein kinase A pathway, which was already established as a fundamental mechanism for transducing extracellular signals.