Gentisate 1,2-dioxygenase (GDO,EC1.14.13) from Klebsiella pneumoniae M5a1 successfully converted gentisate to maleylpyruvate. This biotransformation was performed by using genetically engineered E.

• 来自肺炎克氏杆菌M5a1菌株的龙胆酸1；2双加氧酶(GDO；EC1.；14