氧对球化三态C. sphaeroides反应中心在0 ~ 45℃范围内的猝灭

IF 4.033 Q4 Biochemistry, Genetics and Molecular Biology

Biophysics Pub Date : 2025-10-20 DOI:10.1134/S0006350925700496

P. P. Knox, I. A. Yaroshevich, E. P. Lukashev

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引用次数: 0

摘要

研究了紫菌球形Cereibacter （Rhodobacter）球形Cereibacter （sphaeroides）光合反应中心类胡萝卜素球状体（TCar）在0 ~ 45℃温度范围内的三重态寿命，以及培养基中分子氧浓度对其寿命的影响。在反应中心的光激发下，加入邻菲罗啉（10-2 M）部分取代了反应中心结构上的一级醌受体，形成TCar。在正常好氧条件下和部分脱气条件下测定了TCar淬火过程的活化能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Quenching of the Spheroiden Triplet State with Oxygen in the Reaction Centers of C. sphaeroides in the Temperature Range 0–45°C

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Quenching of the Spheroiden Triplet State with Oxygen in the Reaction Centers of C. sphaeroides in the Temperature Range 0–45°C

The lifetime of the triplet state of the carotenoid, spheroiden (^TCar) in the photosynthetic reaction center of the purple bacteria Cereibacter (Rhodobacter) sphaeroides in the temperature range from 0 to 45°C and the effect of the concentration of molecular oxygen in the medium on this time was studied. O-phenanthroline (10^–2 M), which partially displaces the primary quinone acceptor from the structure of the reaction center, was added to the preparations to form ^TCar upon light excitation of the reaction center. The activation energies of the ^TCar quenching process were determined under normal aerobic conditions and during partial degassing of the studied preparations.

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来源期刊

Biophysics Biochemistry, Genetics and Molecular Biology-Biophysics

CiteScore

1.20

自引率

0.00%

发文量

期刊介绍： Biophysics is a multidisciplinary international peer reviewed journal that covers a wide scope of problems related to the main physical mechanisms of processes taking place at different organization levels in biosystems. It includes structure and dynamics of macromolecules, cells and tissues; the influence of environment; energy transformation and transfer; thermodynamics; biological motility; population dynamics and cell differentiation modeling; biomechanics and tissue rheology; nonlinear phenomena, mathematical and cybernetics modeling of complex systems; and computational biology. The journal publishes short communications devoted and review articles.