Abstract
Summary
Mucoprotein was isolated from human plasma by the perchloric acid filtrate method. This isolated mucoprotein was found to be electrophoretically homogeneous, and consistently inhibited hemagglutination by influenza virus in dilutions which contained .0.15 to 0.3 μg of mucoprotein. Hemagglutination inhibition with heated serum also indicated that the inhibitory substance was a mucoprotein.
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