Evidence for structural distinction between PS IIα and PS IIβ reaction centers

FEBS Letters

Long Pan, Rong¹  Hsu, Ban-Dar¹  Lin, Wen-Jye¹  Lee, Jee-Yau¹ 

[1] Institute of Life Science, National Tsing Hua University, Hsin-Chu, Taiwan 30043, Republic of China

关键词: Photosystem II;    Functional size;    Fluorescence induction;    Chl;    chlorophyll: DCMU;    3-(3;    4-dichlorophenyl)-1;    1-dimethylurea;    LHC;    light-harvesting complex;    PS II;    photosystem II;   

DOI  :  10.1016/0014-5793(87)81241-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The technique of (γ-ray) radiation inactivation has been used to estimate the functional sizes of the PS II centers (PS II_α and PS II_β) responsible for the biphasicity of the fluorescence induction curve from DCMU-inhibited spinach chloroplasts. It is found that the size of PS II_α (266 ± 5 kDa) is almost twice as large as that of PS II_β (135 ± 5 kDa). The result clearly indicates that the two types of PS II are structurally distinct and furthermore, the difference exists in the reaction center per se. Implications on the organization of PS II reaction centers are discussed.

【 授权许可】

Unknown