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JBC, Vol. 254, Issue 8, 2705-2709, Apr, 1979

Inhibition of erythrocyte membrane (Na+ + K+)-activated ATPase by ozone-treated phospholipids

L. Kesner, R. J. Kindya and P. C. Chan

Ozone-treated aqueous suspensions of natural phospholipids yield at least two types of inhibitors of human erythrocyte membrane (Na+ + K+)-ATPase. The more labile ones appear to be carbonyl-containing substances whose inhibitory properties are enhanced if ozonolysis takes place in the presence of putrescine or glycine. Other amines of similar structure are much less effective as potentiators. Semicarbazide destroys the inhibitory properties of the more labile substances and can release putrescine from the complexes it forms with the carbonyl products of ozonolysis. 3the more stable inhibitors are unaffected by putrescine, glycine, or semicarbazide. Synthetic, saturated phospholipids do not produce these inhibitors during ozonolysis.
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