Photoaffinity labeling of PKC isozymes by phorbol ester derivatives Original Research Article

Photoaffinity probes PPDA and PPTD, which have diazoacetyl and trifluorodiazopropionyl group at C-13 position in phorbol, respectively, were synthesized. Photoaffinity labeling of protein kinase C isozymes by both the probes resulted in specific cross-linking.