It also attacks gallic acid methyl ester. One source of the enzyme is an elaboration product of the growth of certain moulds belonging to the genus Aspergillus or Penicillium, for example Aspergillus niger, Aspergillus flavus, or Aspergillus oryzae.

• 这种酶也能进攻棓酸甲酯。这种酶的一个来源是某种霉菌生长所生成的代谢产物。这些霉菌通常属于黑曲霉菌属或青霉菌属,例如黑曲霉,黄曲霉或米曲霉。