REDUCED CONTENT OF THE QUINONE ACCEPTOR QA IN PHOTOSYSTEM-II COMPLEXES ISOLATED FROM THYLAKOID MEMBRANES AFTER PROLONGED PHOTOINHIBITION UNDER ANAEROBIC CONDITIONS

Authors
KOIVUNIEMI A SWIEZEWSKA E ARO EM STYRING S ANDERSSON B
Citation
A. Koivuniemi et al., REDUCED CONTENT OF THE QUINONE ACCEPTOR QA IN PHOTOSYSTEM-II COMPLEXES ISOLATED FROM THYLAKOID MEMBRANES AFTER PROLONGED PHOTOINHIBITION UNDER ANAEROBIC CONDITIONS, FEBS letters, 327(3), 1993, pp. 343-346
Citations number
23
Categorie Soggetti
Biophysics,Biology
Journal title
FEBS letters → ACNP
ISSN journal
00145793
Volume
327
Issue
3
Year of publication
1993
Pages
343 - 346
Database
ISI
SICI code
0014-5793(1993)327:3<343:RCOTQA>2.0.ZU;2-3
Abstract
The plastoquinone content of photosystem II complexes isolated from sp inach photosystem II-enriched membranes subjected to strong photoinhib itory illumination under anaerobic conditions was determined by HPLC. A pronounced decrease of the plastoquinone content was found in the ph otoinactivated complexes. These results corroborate earlier models in which photoinhibitory illumination is suggested to eventually lead to release of doubly reduced and protonated Q(A) from its site on the D2- protein.