A Human Placental Fluid Inhibitor to Hemagglutination by H-1 and H-B Viruses

Abstract

Summary

A substance found in human placental fluids that inhibits the hemagglutination of H-1 and HB viruses but not that of H-3 or RV viruses, has been purified and found to be an electrophoretically homogeneous glycoprotein stable to heat and a wide pH range. It also appears to be immunologically homogeneous and occurs in the slow a or fast β region.