Structural study of the carbohydrate moiety of hen ovomucoid. Occurrence of a series of pentaantennary complex-type asparagine-linked sugar chains.
Hen ovomucoid contains a series of novel pentaantennary complex-type asparagine-linked sugar chains which can be classified into three groups, N-1, N-2, and N-3b, N-3b, the structure of which is found as a common (formula, see text) structure in all pentaantennary sugar chains. N-2 is a mixture of three isomeric monogalactosyl derivatives of N-3b, and N-1 is a mixture of two isomeric digalactosyl derivatives of N-3b. Most of the galactoses are beta-linked at the C-4 position of beta-N-acetylglucosamine residues 2 and 4 in the N-3b structure shown above. Small amounts of the galactoses are also linked at the C-4 position of beta-N-acetylglucosamine residue 3.
D000818:Animals; D001216:Asparagine / Q000032:analysis*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002645:Chickens; D004527:Egg Proteins; D005260:Female; D006020:Glycopeptides / Q000032:analysis; D008745:Methylation; D009844:Oligosaccharides / Q000032:analysis*; D010059:Ovomucin
D004527:Egg Proteins; D006020:Glycopeptides; D009844:Oligosaccharides; D010059:Ovomucin; D001216:Asparagine