The effect of acute cytotoxic reaction in the heart on Ca transport activity in the sarcoplasmic reticulum and the phospholipid content of the myocardium was studied. A single intracoronary injection of anticardiac serum reduced Ca, Mg-ATPase activity and the Ca energy-dependent transport but caused no changes in membrane permeability to Ca. As the result of immune damage the content of phospholipids--cardiolipin and phosphatidylethanolamine--in the myocardium reduced.

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