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Stimulation of a cyclic electron‐transfer pathway around photosystem II by phosphorylation of chloroplast thylakoid proteins
Author(s) -
Horton Peter,
Lee Pam
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)81053-9
Subject(s) - thylakoid , photosystem ii , dcmu , phosphorylation , biophysics , photochemistry , p700 , chloroplast , electron transfer , chemistry , photosystem i , fluorescence , hydroxylamine , electron transport chain , kinetics , photosystem , biology , biochemistry , photosynthesis , optics , physics , gene , quantum mechanics
Fluorescence induction kinetics of phosphorylated and unphosphorylated chloroplast thylakoid membranes have been studied under low light intensity. Hydroxylamine is able to enhance the fluorescence yield to a greater extent in phosphorylated membranes in both the presence and absence of DCMU. Examination of the light intensity dependence of the fluorescence yields leads to the conclusion that protein phosphorylation enhances the efficiency of a NH 2 OH‐sensitive cyclic electron‐transfer pathway around photosystem II.