The constitutes and functions of these two forms are presented in this paper.MMO is a sort of three-enzyme complex system including MMOH,MMOB and MMOR.

• 甲烷单加氧酶是一个三组分复合酶体系,三组分分别是羟基化酶(MMOH)、调节蛋白B(MMOB)和还原酶(MMOR)。