Partition of rat erythrocytes in aqueous polymer two-phase systems

The partition of rat erythrocytes between the top phase and inferface of aqueous poly(ethylene glycol)-dextran two-phase systems containing 0.15 M NaCl and 0.01 M sodium phosphate depends on the association of the cells with microscopic globules of dextran that persist in the poly(ethylene glycol)-rick top phase after the horizontal interface between the two phases has formed.