Biological Properties of Human Leukocyte Interferon Components

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Abstract
Inorganic sulphate (35S) was incorporated into the haemagglutinin molecule of A/Memphis/1/71 (H3N2) influenza virus when a keratosulphate-like host antigen was also incorporated into the glycoproteins of virus grown in the chorioallantoic membrane of the embryonated hen's egg. Little or no 35S-sulphate was incorporated when this host antigen was not present in the glycoproteins of virus grown in chick embryo kidney cells or in the chorioallantoic membrane of embryonated duck eggs.