title: Structure of the asialyl oligosaccharide chains of kappa-casein isolated from ovine colostrum.
abstract: Three oligosaccharide alditols, a di (44-63%), tetra (32-46%), and a pentasacchariditol (5-10%) have been isolated from desialylated caseinomacropeptide obtained from kappa-casein of ewe colostrum. The disacchariditol is 2-acetamido-2-deoxy-3-O-(beta-D-galactopyranosyl)galactitol; in the tetrasaccharide this unit is substituted in position 6 of the galactosaminitol moiety by 2-acetamido-2-deoxy-4-O-(beta-D-galactopyranosyl)-beta-D-glucopyranose, while the pentasacchariditol is derived from the tetrasaccharide by addition of a D-galactopyranosyl unit to position 3 of the galactopyranose unit substituting the glucosamine unit.
mesh_terms: D000818:Animals; D002364:Caseins / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D003126:Colostrum / Q000032:analysis*; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D009439:Neuraminidase; D009844:Oligosaccharides / Q000302:isolation & purification*; D012756:Sheep / Q000378:metabolism*; D013402:Sugar Alcohols / Q000302:isolation & purification
chemical_list: D002364:Caseins; D009844:Oligosaccharides; D013402:Sugar Alcohols; D009439:Neuraminidase