Glycoproteins, Glycopeptides, and Animal Polysaccharides

An investigation of the changing patterns of proteins and glycoproteins on the plasma membrane of Dictyostelium discoideum suggested that glycoproteins are involved in aggregation of the cells. The level of 2-acetamido-2-deoxy-D- 

The similarity of the structures of the terminal carbohydrate sequences of glycoproteins and glycolipids have been reviewed.  

An L-fucose-deficient, precursor glycoprotein of Rauscher leukaemia virus glycoprotein (69/71) has been reported it is synthesized in virus-infected cells from a glycoprotein (mol. wt. 9 x 10 ) which can be labelled with radioactive 2-amino-2-deoxy-D-glucose, but not with L-fucose, whereas the Rauscher glycoprotein can be labelled with both. The principal glycoprotein in three strains of Rous sarcoma virus has been purified, and the structures (1) and (2) were proposed for the carbohydrate moieties of the subgroups A and B, respectively.  

0 X 10 , is extremely acidic, and contains 10—12% of carbohydrate, which consists of a single A -linked oligosaccharide, 22—24 0-linked disaccharides, and 12—14 0-linked trisaccharides per molecule. This glycoprotein is thought to be chiefly responsible for maintaining the shape of the bacterial cell.  

A carbohydrate-binding protein, whose appearance is regulated during development, has been located on the outer surface of the plasma membrane of Dictyostelium discoideum. An examination of mutants showed that the amount 

Moulki, R. Bonaly, B. Fournet, and J. Montreuil, Biochim. Biophys. Acta, 1976, 420, 

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Glycoproteins, Glycopeptides, and Animal Polysaccharides R - -D-Galp-(l -> 4)- 3-D-GlcpNAc-(l ... 

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