10-Pyrene-PC is a substrate for all PLA2s with the exception of cPLA2 and PAF-AH.{5681} Upon phospholipid hydrolysis, 10-pyrenyldecanoic acid is produced from 10-pyrene-PC. The monomeric 10-pyrenyldecanoic acid exhibits fluorescence (excitation 345 nm, emission 395 nm), allowing quantitation of phospholipase activity.{3839}