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Slow release of chloride from 36 Cl‐labeled photosystem II membranes
Author(s) -
Lindberg Katrin,
Wydrzynski Tom,
Vänngård Tore,
Andréasson Lars-Erik
Publication year - 1990
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(90)80788-k
Subject(s) - photosystem ii , spinach , chloride , chemistry , membrane , photosynthesis , manganese , oxygen evolving complex , oxygen evolution , nuclear chemistry , oxygen , inorganic chemistry , biophysics , photochemistry , biochemistry , biology , electrochemistry , organic chemistry , electrode
Photosystem II (PS II) membrane fragments isolated from spinach cultured on a medium containing 36 Cl − retain a significant amount of radioactive chloride corresponding to at least one Cl − per PS II unit. The release of chloride from these sites occurs with halftimes of several hours. Treatments which cause the release of the manganese and/or the extrinsic proteins also result in the loss of chloride from these sites, indicating a possible role for this chloride in photosynthetic oxygen evolution.