Ala-Pro-7-amido-4-trifluoromethylcoumarin, TFA White solid. Supplied as a trifluoroacetate salt. HYGROSCOPIC. A fluorogenic substrate for the serine protease dipeptidylpeptidase IV (DPP IV; Km = 29.6 µM). Purity: ≥95% by HPLC. Excitation max.: ~400 nm, Emission max.: ~505 nm Ala-Pro-AFC Ref.: Smith, R.E., et al. 1992. Histochem. J. 24, 637. | 
