[Changes in erythrocyte membrane permeability after freezing with polyethylene oxide and glycerol]

Membrane ion permeability to sodium cations and phosphate anions, acid resistance and phospholipid composition were studied in erythrocytes frozen and thawed with 15% glycerol and 10% solution of polyethylene oxide 1500. An increase in membrane permeability to 22Na and HPO4(2-) against a background of reduction in phospholipids and total acid resistance was observed after rapid freezing-thawing and removing of cryoprotectants.