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>Structure of the major neutral oligosaccharide-alditols released from the egg jelly coats ofAxolotl maculatum. Characterization of the carbohydrate sequence GalNAc(ηl-4)Fuc(αl-3) GlcNAc(ηl-3 6)
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Structure of the major neutral oligosaccharide-alditols released from the egg jelly coats ofAxolotl maculatum. Characterization of the carbohydrate sequence GalNAc(ηl-4)Fuc(αl-3) GlcNAc(ηl-3 6)
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机译：Structure of the major neutral oligosaccharide-alditols released from the egg jelly coats ofAxolotl maculatum. Characterization of the carbohydrate sequence GalNAc(ηl-4)Fuc(αl-3) GlcNAc(ηl-3 6)
Several O-linked oligosaccharides of the jelly coat surrounding the eggs ofAxolotl maculatumwere analysed by1H-NMR spectroscopy. The four major oligosaccharide-alditols released by reductiveη-elimination display either the Lewisx(Lex) determinant or the sequence GalNAc(ηl-4)Fuc(αl-3)GlcNAc This last structure has previously been characterized in allergenically active oligosaccharides isolated from the sea squirt H-antigen, and hi the N-linked glycans ofSchistosoma mansoniand human urokinase. It represents the major carbohydrate chain found inA.macu-latum,the oviduct of which constitutes an excellent source ofηl-4-acetylgalactosaminyl transferase activity. Moreover, the carbohydrate chains isolated fromA.maculatumare quite different from those found hi seven other amphibian species, in which the presence of species-specific material has been characterized. The role of carbohydrates appears more and more apparent during the fertilization process, and the diversity of the O-linked oligosaccharides supports such a biological r
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