期刊
FEBS LETTERS
卷 579, 期 11, 页码 2273-2276出版社
WILEY
DOI: 10.1016/j.febslet.2005.02.076
关键词
P700; photosystem I; photosynthesis; redox potential
The redox potentials of P700, the primary electron donor of photosystem (PS) I, of spinach and Thermosynechococcus elongatus were determined by means of spectroelectrochemistry with an error range of +/- 2-3 mV, to find that the redox potential of P700 in T. elongatus is lower by ca. 50 mV as compared with spinach. The shift in the P700 redox potential of PS I core particles prepared by harsh detergent treatments remained to within 10 mV for both organisms. These results show that the 50 mV difference in the P700 redox potential between the two organisms is not a detergent-induced artifact but reflects an intrinsic property of each PS I. (c) 2005 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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