IONIC CHANNEL ACTIVITY-INDUCED BY FUSION OF RHODOSPIRILLUM-RUBRUM CHROMATOPHORES WITH A PLANAR BILAYER-LIPID MEMBRANEстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The present work concerns mechanisms of ionic conductivity of photosynthetic membranes. It is shown that reconstitution of vesicles of photosynthetic membranes (chromatophores) of purple bacteria Rhodospirillum rubrum into a planar bilayer lipid membrane leads to fluctuations of current showing the existence of a channel with a predominant conductance of similar to 230 pS in the presence of 100 mM KCl. Measurements under the conditions of KCl gradient prove that this channel is cation selective (R(K)/R(Cl) = 7.2). Voltage inactivation of the channel is demonstrated which is prevented by treatment with trypsin.