Glycogen phosphorylase-IN-1 is a selective and potent inhibitor of human hepatic glycogen phosphorylase (hlGPa) with inhibitory effects on hlGPa activity and on hepatocyte glycogen-derived glucose production, and can be used in the study of type 2 diabetes mellitus and canine lupus.

Steppogenin exhibits significant tyrosinase inhibition activity, ;it also shows strong mushroom tyrosinase inhibitory activity with IC(50) values lower than 50 microM, more potent than kojic acid (IC(50) = 71.6 microM), a well-known tyrosinase inhibitor.

H-Arg-4MβNA (H-Arg-4MbNA) is a peptide that serves as a substrate for cathepsin H. The enzyme activity is often detected in gel electrophoresis.