P - 680与C - 550之间的关系。
The relationship between P-680 and C-550.
作者信息
Butler W L
出版信息
Biophys J. 1972 Jul;12(7):851-7. doi: 10.1016/S0006-3495(72)86128-9.
Abstract
The published reports of flash-induced absorbance changes in the 680-690 nm spectral region, which have been attributed to bleaching of the primary reaction center chlorophyll of photosystem II (PSII) P-680, are discussed in light of what is known about the primary electron acceptor of PSII, C-550. The question of whether the fluorescence yield changes, which accompany the photoreduction of C-550, might influence the measurements of chlorophyll bleaching is examined. The responses attributed to P-680 and their relationship to C-550 indicate that, if the absorbance measurements are valid, P-680 probably functions as the primary electron donor to PSII rather than as a photochemical sensitizer of the primary redox reaction.
摘要
根据对光系统II（PSII）初级电子受体C-550的已知信息，讨论了已发表的关于在680 - 690纳米光谱区域中闪光诱导吸光度变化的报告，这些变化被归因于光系统II（PSII）P - 680初级反应中心叶绿素的漂白。研究了伴随C - 550光还原的荧光产率变化是否可能影响叶绿素漂白测量的问题。归因于P - 680的响应及其与C - 550的关系表明，如果吸光度测量有效，P - 680可能作为PSII的初级电子供体，而不是初级氧化还原反应的光化学敏化剂。
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