title: 3-O-methyl sugars as constituents of glycoproteins. Identification of 3-O-methylgalactose and 3-O-methylmannose in pulmonate gastropod haemocyanins.
abstract: In addition to the already knownonosaccharides fucose, xylose, mannose, galactose, glucose, N-acetylgalactosamine and N-acetylglucosamine, the carbohydrate part of the haemocyanin from Helix pomatia (Roman snail) contains 3-O-methylgalactose, and that from Lymnaea stagnalis (a freshwater snail) 3-O-methylgalactose and 3-O-methylmannose. The 3-O-methyl sugars were identified by g.l.c.-mas spectrometry of the corresponding trimethylsilyl methyl glycosides and the alditol acetates, and by co-chromatography with the synthetic reference substances.
mesh_terms: D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D006372:Helix, Snails / Q000378:metabolism*; D006433:Hemocyanins / Q000032:analysis*; D008195:Lymnaea / Q000378:metabolism*; D008759:Methylglycosides / Q000032:analysis*
chemical_list: D008759:Methylglycosides; D006433:Hemocyanins