2024-02-072024-02-072018BRITO, Dayane R. et al. Partially methylated galactans containing different proportions of 3-O-methyl-galactose from Pleurotus citrinopileatus. Carbohydrate Research, Amsterdam, v. 458/459, p. 29-34, 2018. DOI: 10.1016/j.carres.2018.02.002. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S000862151730890X?via%3Dihub. Acesso em: 29 jan. 2024.e- 1873-426X0008-6215https://www.sciencedirect.com/science/article/abs/pii/S000862151730890X?via%3DihubPleurotus citrinopileatus, popularly known as “golden oyster mushroom” have medicinal properties, which are attributed mainly to the presence of bioactive polysaccharides. In this work, two partially 3-O-methylated galactans were isolated from the fruiting bodies of this fungus, via successive aqueous extraction, followed by fractionation by freeze-thawing, and precipitation of soluble material with Fehling solution. The structural assignments were carried out using mono- and bidimensional NMR spectroscopy, monosaccharide composition, and methylation analyses. The polysaccharides were characterized as linear, partially 3-O-methylated (1 → 6)-linked α-galactopyranans, containing only Gal and 3-O-Me-Gal, in 2:1 and 1:1 molar ratios, with molar masses of 37.6 × 103 g/mol and 28.5 × 103 g/mol, respectively. Similar structures have been described for other Pleurotus spp., but showing a lower content of 3-O-Me-Gal.engAcesso RestritoArtigo10.1016/j.carres.2018.02.002