Abstract
Summary
Sixty-eight of 101 cord sera possessed ability to lyse papainized red blood cells. Heating of cord sera to 56°C enhanced lytic activity and revealed hemolytic properties in some of previously negative sera. This lytic property could be eliminated by heating sera to 80° − 100°C for 30 minutes, and in most cases by dialysis against a physiological salt solution. Incubation of normal erythrocytes in cord serum caused an increased osmotic fragility.
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