Isolation and structures of the third major type of carbohydrate units in polysialoglycoproteins from rainbow trout eggs
Iwasaki, M.; Nomoto, H.; Kitajima, K.; Inoue, S.; Inoue, Y.
Biochemistry International 8(4): 573-579
1984
ISSN/ISBN: 0158-5231 PMID: 6541044 Document Number: 241028
The structures of the third major type of oligosialyloligosaccharides obtained by alkali-borohydride treatment of polysialoglycoproteins of the unfertilized eggs of rainbow trout have been determined to be: alpha-L-fucosyl-(1----3)-beta-N-acetyl-D-galactosaminyl-(1----3)-beta-D- galactosyl-(1----4)-beta-D-galactosyl-(1----3)-[[(----8)-alpha-N- glycolylneuraminyl-(2----)]n-(----6)]-N-acetyl-D-galactosaminitol with n = 1 to 4. The proportion of the fucose-containing units in 3 major carbohydrate units present in fish egg polysialoglycoproteins was found to be highly species-specific and only 6% in the eggs of rainbow trout.