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Phosphorylation of chloroplast thylakoid membrane proteins does not increase the absorption cross‐section of photosystem 1
Author(s) -
Haworth Philip,
Melis Anastasios
Publication year - 1983
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(83)80982-x
Subject(s) - thylakoid , photosystem i , photosystem ii , light harvesting complexes of green plants , chloroplast , biophysics , cytochrome b6f complex , absorption cross section , photosystem , phosphorylation , photosynthesis , atp synthase , chemistry , photochemistry , absorption (acoustics) , biology , biochemistry , physics , cross section (physics) , optics , quantum mechanics , gene , enzyme
Direct measurements on the effective absorption cross‐section of photosystem (PS) 1 were obtained with control (light — ATP) and phosphorylated (light + ATP) chloroplast thylakoids from spinach. The rate of light absorption by PS1 was invariant in control and phosphorylated thylakoids, suggesting a constant functional antenna size for this photosystem. We conclude that phosphorylated chlorophyll a‐b light‐harvesting complex from PS2 is not functionally connected with the antenna pigment of PS1.