|Bacteria Phaeospirillum molischianum
|Mascle-Allemand C, Lavergne J, Bernadac A, Sturgis JN. Organisation and function of the Phaeospirillum molischianum photosynthetic apparatus. Biochim Biophys Acta. 2008 Dec1777(12):1552-9PubMed ID18948077
|Reserchers investigated the organisation of the photosynthetic apparatus in Phaeospirillum molischianum, using biochemical fractionation and functional kinetic measurements.
|Researchers find that the diffusion time required for a quinol released by the reaction centre to reach a cytochrome bc1 complex is about 260 ms. On the other hand, the reduction of the cytochrome c chain by the cytochrome bc1 complex in the presence of a reduced quinone pool occurs with a time constant of about 5 ms. The overall turnover time of the cyclic electron transfer is about 25 ms in vivo under steady-state illumination. The sluggishness of the quinone shuttle appears to be compensated, at least in part, by the size of the quinone pool.