[Effect of fasting on the content and transport of potassium ions in rat liver mitochondria].

The paper deals with the effect of fasting on the content and transport of potassium ions in the rat liver mitochondria as well as on oxidative phosphorylation. It is shown that the concentration of potassium ions in the mitochondria under fasting lowers by 20-30% at an average as compared to the control. The rate of potassium ions release from the mitochondria in the presence of DNP also lowers. It is found that the respiratory control ratio after 24-h fasting decreases and increases after 48-h fasting. Possible reasons of changes in the transport of potassium ions in the rat liver mitochondria in fasting are discussed.