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Trolox, a Water-Soluble Analogue of alpha-Tocopherol, Photoprotects the Surface-Exposed Regions of the Photosystem II Reaction Center in Vitro. Is This Physiologically Relevant?
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SYSNO ASEP 0367255 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Trolox, a Water-Soluble Analogue of alpha-Tocopherol, Photoprotects the Surface-Exposed Regions of the Photosystem II Reaction Center in Vitro. Is This Physiologically Relevant? Author(s) Arellano, J.B. (ES)
Li, H. (NO)
Gonzalez-Perez, S. (ES)
Gutierrez, J. (ES)
Melo, T.B. (NO)
Vácha, František (BC-A) RID
Naqvi, K.R. (NO)Number of authors 7 Source Title Biochemistry. - : American Chemical Society - ISSN 0006-2960
Roč. 50, č. 39 (2011), s. 8291-8301Number of pages 11 s. Language eng - English Country US - United States Keywords SINGLET OXYGEN SCAVENGER ; PHOTOSENSITIZED OXIDATION ; BETA-CAROTENE Subject RIV CE - Biochemistry CEZ AV0Z50510513 - UMBR-M, BC-A (2005-2011) UT WOS 000295187200005 DOI https://doi.org/10.1021/bi201195u Annotation Can Trolox, a water-soluble analogue of alpha-tocopherol and a scavenger of singlet oxygen ((1)O(2)), provide photoprotection, under high irradiance, to the isolated photosystem II (PSII) reaction center (RC)? To answer the question, we studied the endogenous production of (1)O(2) in preparations of the five-chlorophyll PSII RC (RCS) containing only one beta-carotene molecule. The temporal profile of (1)O(2) emission at 1270 nm photogenerated by RCS in D(2)O followed the expected biexponential behavior, with a rise time, unaffected by Trolox, of 13 +/- 1 mu s and decay times of 54 +/- 2 mu s (without Trolox) and 38 +/- 2 mu s (in the presence of 25 mu M Trolox). Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2012
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