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Effect of dibromothymoquinone (DBMIB) on reduction rates of Photosystem I donors in intact chloroplasts.

作者信息

Farineau J, Bottin H, Garab G

出版信息

Biochem Biophys Res Commun. 1984 May 16;120(3):721-5. doi: 10.1016/s0006-291x(84)80166-7.

DOI:10.1016/s0006-291x(84)80166-7
PMID:6375660
Abstract

Dual effect of dibromothymoquinone ( DBMIB ), inhibitor and reducing agent at the donor side of Photosystem I, was investigated in isolated intact chloroplasts by flash-induced absorbance changes at 820 and 515 nm. We show that in the absence of other electron donors, rereduction of P700+ by DBMIB proceeds at a very low rate (half-time of approximately 10 s) Dual effect of DBMIB explains that the initial rise of electrochromic absorbance change induced by repetitive flashes is usually not diminished while the slow rise is fully inhibited by this compound.

摘要

相似文献

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