plastoquinone

PSII functions as a water / plastoquinone oxidoreductase in the thylakoid membrane of chloroplasts and cyanobacteria , comprising one of the light reaction centers for photosynthesis .

光系统Ⅱ（PSⅡ）是绿色植物光合膜上存在的两个光反应中心之一，具有利用太阳光的能量来裂解水、释放分子氧并还原质体醌的功能。

Photosystem II ( PSII ) is a multisubunit pigment-protein complex that catalyzes the light-driven water oxidation and reduction of plastoquinone .

光系统Ⅱ（PSⅡ）是由多个亚基组成的色素蛋白复合体，它催化光驱动的水的裂解和醌的氧化。

Photosystem II ( PSII ), which catalyzes light-dependent water oxidation and plastoquinone reduction in chloroplasts , is a large pigment-protein complex in the thylakoid membrane .

在叶绿体中，光系统Ⅱ（PSⅡ）是类囊体膜上的一个大的色素蛋白质复合物，利用光能催化水的氧化以及质体醌的还原。

Possible reasons for the discrepancy in the velocities of the accumulation and transformation of the intermediates compared with that of the process of photophosphorylation are suggested and the similarities of the accumulated intermediates to plastoquinone are discussed .

文中对此中间产物积聚与转化速度较光合磷酸化过程为慢的现象分析了它可能的原因，并且将此中间产物与叶绿醌的一些性貭的类似之处作了讨论。