Mca-PLAC(p-OMeBz)-WAR(Dpa)-NH2 is a fluorogenic substrate for matrix metalloproteinase-14 (MMP-14). Upon cleavage by MMP-14, 7-methoxycoumarin-4-acetyl (Mca) is released and its fluorescence can be used to quantify MMP activity. Mca displays excitation emission maxima of 328 420 nm, respectively.