Abstract
Zinc, cupric, and cadmium ions, in that order of effectiveness, inhibited lysis of washed, rabbit erythrocytes by the toxic bacterial product aerolysin. Hemolysis induced by a variety of other lytic agents was also inhibited by Zn2+ in approximately the same concentration as that, 0.33 mM, needed to inhibit aerolysin-induced hemolysis. Zinc ions did not inhibit osmotic lysis. Inhibition requires the continues presence of Zn2+ and apparently involves a readily reversible binding of Zn2+ to the cell surface, which, it is postulated is accompanied by a reversible alteration in the state of the lipid bilayer.
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