Pheophytin or phaeophytin (abbreviated Pheo) is a chemical compound that serves as the first electron carrier intermediate in the electron transfer pathway of photosystem II (PS II) in plants, and the photosynthetic reaction center (RC P870) found in purple bacteria. In both PS II and RC P870, light drives electrons from the reaction center throug...
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http://en.wikipedia.org/wiki/Pheophytin
(from the article `photosynthesis`) ...transfer electrons to the first acceptor. These first acceptors also are strong reducing agents and rapidly pass electrons to more stable ...
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http://www.britannica.com/eb/a-z/p/55
pheophytin, phaeophytin A bluish black waxy pigment that can be formed from chlorophyll by replacement of the magnesium with two hydrogen atoms by treatment with a weak acid (as oxalic acid).
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http://www.wordinfo.info/words/index/info/view_unit/1623/
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