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期刊论文

Influence of calcium ion on photosystem II oxygen evolution*

梁厚果DU Linfang SUN Xun PAN Yonghua LIN Honghui and LIANG Houguo

SCIENCE IN CHINA (Series B) 1995, 38 (12): 1339~1447,-0001,():

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摘要/描述

Treatment of photosystem II particles with Nacl-washings, low-PH washings or detergent OG solubilizings inhibited oxygen evolution and the inhibition was reversed by addition of exogenous ca2+ Dynamic analysis with Ca2+ reconstitution revealed two Ca2+ binding sites with different affinities in the NaC1-washed PS II partides lr in the low-PH-treated ones. oxygen-evolving PS II core complex also contained the high and low affinity Ca2+ binding sites ca2+ enhanced the intensity of fluores cence emission of PS II core complex These results suggest that cacium play two roles in PS II, the low affinity Ca2+ is associated with energy transfer while the high affinity Ca2+ is concerned with water splitting reaction.

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