title: The chemical structure of a tetrasaccharide containing N-acetylglucosamine obtained from bovine colostrum kappa-casein.
abstract: A tetrasaccharide consisting of D-galactose, N-acetylneuraminic acid, N-acetylglucosamine and N-acetylgalactosaminitol (1 : 1 : 1: 1) was obtained from bovine colostrum kappa-casein. It is the main carbohydrate portion of a caseinoglycopeptide formed by alkaline borohydride treatment. The carbohydrate sequence was analyzed by enzymatic and chemical methods and by mass spectrometry, and was shown to be N-acetylglucosaminyl-beta-1-3-galactosyl-beta-1-3[N-acetylneuraminyl-alpha-2-6- ]-N-acetylgalactosaminitol.
mesh_terms: D000117:Acetylglucosamine / Q000032:analysis*; D000818:Animals; D002236:Carbohydrate Conformation; D002241:Carbohydrates / Q000032:analysis; D002364:Caseins; D002417:Cattle; D003126:Colostrum / Q000032:analysis*; D005260:Female; D005944:Glucosamine / Q000031:analogs & derivatives*; D013058:Mass Spectrometry; D009844:Oligosaccharides / Q000032:analysis*; D011247:Pregnancy
chemical_list: D002241:Carbohydrates; D002364:Caseins; D009844:Oligosaccharides; D005944:Glucosamine; D000117:Acetylglucosamine