Small Molecule Tyrosinase Inhibitors for Treatment of Hyperpigmentation Tyrosinase plays a central role in the production of melanin pigments. Consequently, this enzyme is abundantly expressed in the melanocytes of the Atlantic salmon's skin. Interestingly, it can also Hvard Bjrgen Novel tyrosinase inhibitory peptide with free radical scavenging ability The Glutathione Derivative, GSH Monoethyl Ester, May Effectively Whiten Skin but GSH Does Not