The particulate enzyme fraction obtained from Micrococcus Zysodeikficus catalyzed the incorporation of D-[r4C]glucose from uridine diphospho-n-[r4C]glucose into a polymer which resembled the n-glucoseand N-acetyl-n-mannosaminuronic acid-containing polysaccharide of the cell walls of this organism. In vifro biosynthesis of the polysaccharide depended upon the presence of the uridine diphospho-Na...

The specific capsular polysaccharide of type 45 Streptococcus pneumoniae was isolated in pure form by chemical and chromatographic methods and found to be a high-molecular-weight, glycosidically linked polymer of a hexasaccharide repeating unit composed of D-galactose (2 mol), L-rhamnose (1 mol), N-acetyl-D-glucosamine (1 mol), N-acetyl-D-galactosamine (1 mol), N-acetyl-L-fucosamine (1 mol), an...

A covalently triggered fluorescence turn-on detection scheme has been implemented for a tris(N-salicylideneamine)-derived dynamic fluorophore. Selective cleavage of strategically placed Si-O bonds by fluoride ion induces spring-loaded conformational transitions that are tightly coupled to fluorescence enhancement.

background :   chitosan is unbranched polysaccharide composed of d-glucosamine and n-acetyl-d-glucosamine. chitosan, derived from shrimp shell, has broad antimicrobial properties against gram-negative, gram-positive bacteria and fungi.   methods :  chitosan was extracted from shrimp shell and studied for cell entrapment and anti-bacterial properties. the hydrogel chitosan was used as the beads ...

Abbreviations: BC: Bladder Cancer; MIBC: Muscle-Invasive BC; NMIBC: Nonmuscle-Invasive BC; BPH: Benign Prostatic Hyperplasia; CT: Computed Tomography; CEA: Carcinoembryonic Antigen; CA19-9: Carbohydrate-Antigen 19-9; HCC: Hepatocellular Carcinoma; TCC: Transitional Cell Carcinoma; UC: Urotherial Carcinoma; Hex: Hexose; Man: D-mannose; Gal: D-galactose; HexNAc: N-acetylhexsosamine; GlcNAc: N-ace...

A d-glucosamine 6-phosphate N-acetyltransferase from Blastocladiella emersonii zoospores was partially purified to a specific activity of 2.41 IU per mg of protein. Its pH optimum was 8.05 and its K(m) values were 2.4 x 10(-4) M d-glucosamine 6-phosphate and 0.38 x 10(-4) M Na(3)S-acetyl coenzyme A.

The relationship between two aminopolysaccharide stereoisomers, namely α-(1→4)- and β-(1→4)-linked (N-acetyl)-D-glucosamine polymers, is of significant interest within the field of polysaccharide science, as they correspond to amino analogs of the representative abundant natural polysaccharides, viz. amylose and cellulose. While the latter glucosamine polymer is the basis of well-known natural ...