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J Virol. 1980 November; 36(2): 309-316

Separation of cyanogen bromide-cleaved peptides of the vesicular stomatitis virus glycoprotein and analysis of their carbohydrate content.

ABSTRACT

The purified glycoprotein of vesicular stomatitis virus was cleaved at methionine residues with cyanogen bromide, and the resultant peptides were analyzed by two-dimensional electrophoresis in sodium dodecyl sulfate-polyacrylamide gels. Five peptide bands were resolved in cylindrical gels run under nonreducing conditions. After reduction and electrophoresis in the second dimension, 11 peptides were resolved, indicating that several were originally linked by disulfide bonds. Double-label experiments indicated that at least 8 of the 11 peptides were unique. The major oligosaccharide chains were attached to two different cyanogen bromide peptides. In addition, six other peptides contained small amounts of sialic acid, fucose, and mannose, indicating that the glycoprotein contains more carbohydrate chains than the two major ones which have been reported previously.