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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Poly(N-acetyllactosaminyl) oligosaccharides of chromaffin granule membrane glycoproteins.

Poly(N-acetyllactosaminyl) oligosaccharides have been identified, on the basis of their susceptibility to endo-beta-galactosidase, in a large-molecular-size glycopeptide fraction derived from chromaffin granule membrane glycoproteins. The glycoproteins containing poly(N-acetyl-lactosaminyl) oligosaccharides were selectively labeled by treatment of chromaffin granule membranes with endo-beta-galactosidase to expose N-acetylglucosamine residues, followed by incubation with galactosyltransferase and UDP-[14C]galactose. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and fluorography demonstrated specific labeling in the 41-47 kilodalton (kD) region and in a distinct band at 90 kDa. Two-dimensional SDS-PAGE revealed that the poly(N-acetyllactosaminyl) oligosaccharides are predominantly present in glycoprotein IV, together with lesser labeling of glycoproteins II and III, whereas they are absent from dopamine beta-hydroxylase and carboxypeptidase H, which are the major glycoproteins of chromaffin granule membranes.[1]

References

  1. Poly(N-acetyllactosaminyl) oligosaccharides of chromaffin granule membrane glycoproteins. Margolis, R.U., Fischer-Colbrie, R., Margolis, R.K. J. Neurochem. (1988) [Pubmed]
 
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