Contents to volume 164 |
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Authors: | Eduard C Hurt Günter Hauska |
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Institution: | Universität Regensburg, Institut für Botanik, D-8400 Regensburg, FRG |
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Abstract: | Cytochrome b6 from spinach chloroplasts (either within the purified cytochrome b6f complex, or in its isolated form) exhibits two spectral species, which correspond to two midpoint potentials. This can be demonstrated by low temperature difference spectroscopy at fixed redox potentials. The high potential form of cytochrome b6 has a split α-peak at 557.5 and 561.5 nm, the low potential form has a symmetrical α-peak at 560.5 nm. Similar results were obtained with cytochrome b6 in the isolated cytochrome b6f complex from the cyanobacterium Anabaena variabilis. |
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Keywords: | Chloroplast electron transport Cyanobacteria Low temperature difference spectroscopy Redox potential MOPS MES Tris Tris(hydroxymethyl) aminomethane |
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