1995•Journal of Integrative Plant BiologyRequires access

Light-Induced Damage of Pheophytin a Molecule in the Isolated Photosystem II Reaction Center D1/D2/Cyt b559 Complex

Tingyun Kuang, Jian-Min Hou, Peng De-chuan, Tang Chong-qin, Tang Pei-song

Abstract

Photodamage of some pigments in the isolated photosystem Ⅱ (PSⅡ) reaction center D1/D2 Cyt b559 complex form spinach has been investigated by means of high performance liquid chromatography. The light--induced damage of pheophytin a (pheo a) in the complex was observed for the first time. The content of pheo a decreased about 47% by illumination, suggesting only one of the two pheo a molecules in the PSⅡ reaction center complex was damaged. No damage of beta--carotene was found.

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Key concepts: Pheophytin, Photosystem II, Photosynthetic reaction centre, Chemistry, Photochemistry, Molecule, Photosynthesis, Biochemistry