An internally quenched fluorogenic substrate (Ab/Em =328/393 nm) for cathepsins D and E and not for B, H or L, obtained from the hepatopancreas (liver) of the Japanese common squid (Todarodes pacificus). The cleavage occurs at the Phe-Phe amide bond resulting in enhanced fluorescence and is used in screening cathepsin D and E inhibitors and for determining cathepsin D and E activity in tissue cell extracts.
Yasuda, Y. et al. J. Biochem. 125, 1137 (1999).
Sequence (One-Letter Code)
Sequence (Three-Letter Code)
7 - Methoxycoumarin - 4 - Acetyl - Gly - Lys - Pro - Ile - Leu - Phe - Phe - Arg - Leu - Lys(Dnp) - D - Arg - NH2