The capsular polysaccharide of Diplococctw pneumoniae Type XII contains residues of D-glucose and D-galactose in a molar ratio of 2:l. The methylated polysaccharide yielded upon hydrolysis 2,3,4,6-tetraand 3,4,6-tri-O-methyl-D-glucose and 2,3,4,6-tetra-0-methyl-D-galactose as the only neutral methyl sugars. Periodate oxidation of the polysaccharide resulted in destruction of all neutral sugars ...

The Bidder's organ and ovary of the Brazilian toad Bufo ictericus were studied by light microscopy, using hematoxylin-eosin (HE) and periodic acid Schiff (PAS) staining. The expression and distribution of carbohydrate moieties was analyzed by lectin histochemistry, using 8 lectins with different carbohydrate specificities: Ulex europaeus (UEA I), Lens culinaris (LCA), Erythrina cristagalli (ECA...

Three critical aromatic sites have been identified in the yeast galactose transporter Gal2: Tyr(352) at the extracellular boundary of putative transmembrane segment (TM) 7, Tyr(446) in the middle of TM10 and Phe(504) in the middle of TM12. The relationship between these sites was investigated by random mutagenesis of each combination of two of the three residues. Galactose transport-positive cl...

Galactose mutarotase catalyzes the first step in normal galactose metabolism by catalyzing the conversion of beta-D-galactose to alpha-D-galactose. The structure of the enzyme from Lactococcus lactis was recently solved in this laboratory and shown to be topologically similar to domain 5 of beta-galactosidase. From this initial X-ray analysis, four amino acid residues were demonstrated to be in...

this study was conducted to evaluate the effect of purslane hydro alcoholic extract on blood urea nitrogen (bun), creatinine (cr) and kidney histopathology of kidney aging model induced by d-galactose in female mice. in this experimental study, 72 female naval medical research institute (nmri) mice (30-35 g) were randomly divided into six groups including: control, purslane, d-galactose, d-gala...

The isolation of lectins by affinity chromatography with crosslinked hemicelluloses has been a common practice because the variety glycosides that they present, improving different kinds lectins, such as galactose ligands.Lectins for carbohydrates is so specific simple configuration chiral carbon can affect affinity, and there are more related to alfa-galactosidic than beta-galactosidic residue...

Tritiated borohydride reduction of cells treated in situ with galactose oxidase and neuraminidase was used to label externally oriented glycoproteins and glycolipids of the plasma membrane. The tritium was incorporated into galactose and galactosamine residues of both glycoproteins and glycolipids of two rat hepatoma cell types-monolayer H-35 cells and suspension cultures of HTC cells. The glyc...

The carbohydrate composition of an IgA (a, subtype) myeloma protein has been determined. The carbohydrate, present only on the heavy chain, was found to consist of 3 moles of sialic acid, 9 mole of galactose, 5.4 moles of mannose, 0.8 moles of fucose, 8.8 moles of N-acetylglucosamine, and 5 moles of N-acetylgalactosamine per mole of heavy chain. Four major glycopeptide-containing fractions were...