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Anomalous Temperature Dependence of the Triplet-Triplet Energy Transfer in Cereibacter sphaeroides I(L177)H Mutant Reaction Centers.

Biochemistry. Biokhimiia - 1 Sept 2024

Fufina Tatiana Yu, Vasilieva Lyudmila G, Klenina Irina B, Proskuryakov Ivan I

Abstract excerpt

In photosynthetic reaction centers, quenching of the primary donor triplet state by energy transfer to the carotenoid molecule provides efficient suppression of generation of singlet-excited oxygen, potent chemical oxidant. This process in the Cereibacter sphaeroides reaction centers is thermoactivated, and discontinues at temperatures below 40 K. In these reaction centers, substitution of amino acid residue...

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PMID: 39418516
DOI: 10.1134/S0006297924090049

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