1993 Volume 57 Issue 10 Pages 1666-1669
The glycosidation of (+)catechin, which has five hydroxyl groups with cyclodextrin glucanotransferase (CGTase, EC 2.4.1.19) and soluble starch has been studied. One of the transfer products was purified and its structure was determined to be (+)catechin 3'-O-α-D-glucopyranoside. This glucoside noncompetitively inhibited the activity of tyrosinase from mushroom, IC50 being 5.8 mM, but didn't inhibit that from mouse melanoma. In contrast, arbutin (hydroquinone-O-β-D-glucopyranoside) inhibited both tyrosinases.
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