Effect of the polycationic antibiotic polymyxin B on the respiratory activity of rat liver mitochondria
1980
: the mechanism of the effect of the peptide antibiotic polymixin B on respiration of rat liver mitochondria was studied. It was shown that polymixin B at concentrations of (1,6--2,0) . 10(-3) M inhibits mitochondrial respiration in state 3 and 3u irrespective of the oxidation substrate used and activates oxygen consumption in state 4 at lower concentrations. It is assumed that the antibiotic affects mitochondrial respiration by changing the ionic permeability of the membranes.
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