Abstract
Summary
The data reported indicate that a stromal glycoprotein, homogeneous by several criteria, is an active inhibitor of viral hemagglutination and has M-N blood group specificity. Both properties decrease in activity when the protein is removed from solution by mixing with influenza virus and centrifuging the mixture or when it is reacted with anti-M-N serum. It has always been observed that the disappearance of the one property of the protein is accompanied by the disappearance of the other. These results are interpreted as an indication that a single protein possesses both of these properties.
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