Abstract
Summary
(1) A saline extract of the liver of fetal guinea pig possesses greater hemolytic activity than a similarly prepared extract of maternal liver, as determined after 4 hours incubation at 38°C.
(2) The activity, for the most part, is due to a heat-sensitive agent and, to a lesser extent, to a heat-resistant substance.
(3) The lytic action of such extracts is not species-specific. It will lyse red cells from the same fetus, as well as those from the mother or from another species.
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