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Comparative analysis of carbohydrate chains variations in influenza virus A/Leningrad/385/80 (H3N2) hemagglutinin (HA) and its heavy (HA1) and light (HA2) chains has been carried out. The carbohydrate chains of these three glycoproteins were eliminated by reductive cleavage of N-glucosaminidic linkages under LiBH4 - tert-BuOH treatment. Fractionation of the oligosaccharides thus obtained by means of gel chromatography and HPLC resulted in isolation of 21 individual oligosaccharides from each glycoprotein. Their monosaccharide composition revealed almost identical pattern of high-mannose as well as complex chains in HA1 and HA2 in spite of different number (6-7 in HA1 and only 1 in HA2) of glycosilated sites. The possibility of a great number of both high-mannose and complex chains attached at the same site of glycoprotein is shown.
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