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The separation of haemagglutination inhibitors from antibodies to parainfluenza viruses by gel filtration on a Sephadex G-200 column

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Abstract

Normal rabbit sera and sera of rabbits hyperimmunized against parainfluenza viruses types I and III were examined. Non-specific inhibitors of parainfluenza haemagglutinin were found in 19S and 4S fractions prepared by gel filtration. Specific antibodies were found in the 7S fraction and these could, therefore, be clearly separated from the non-specific inhibitors by gel filtration on a Sephadex G-200 column.

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