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Flash-induced relaxation changesd of the EPR signals from the manganese cluster and Yd reveal a light-adaptation process of photosystem II

Peterson Arskold, Sindra; Ahrling, Karin; Hogblom, Joakim; Styring, Stenbjorn


By exposing photosystem II (PSII) samples to an incrementing number of excitation flashes at room temperature, followed by freezing, we could compare the Mn-derived multiline EPR signal from the S2 oxidation state as prepared by 1, 5, 10, and 25 flashes of light. While the S2 multiline signals exhibited by these samples differed very little in spectral shape, a significant increase of the relaxation rate of the signal was detected in the multiflash samples as compared to the S2-state produced...[Show more]

CollectionsANU Research Publications
Date published: 2003
Type: Journal article
Source: Biochemistry
DOI: 10.1021/bi026848c


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