The enzyme tannase, which is used in the present invention, is known to hydrolyse the galloyl ester linkages of polyphenolic substrates such as tannic acid, tea polyphenol gallates, and the like.

• 我们知道,这种在本发明中所使用的丹宁酶,可水解多酚酸类物质的棓酸酯键,如丹宁酸,茶叶的棓酸多酚酯及其类似物。