FSL-尾-D-N-acetylgalactosamine

N-乙酰半糖胺 N-acetylgalactosamine

N-乙酰半糖胺 N-acetylgalactosamine D-型相当于 N-乙酰 -D-葡糖胺的 4位差向异构体，化学系统名为 2-乙酰胺 -2-脱氧 -D-半乳糖。除已知它主要是动物结缔组织基质成分的硫酸软骨素或硫酸皮朕素的组成糖外，还作为血型物质等一般糖蛋白的组成糖。这些多糖以强酸下水解时，则脱乙酰游离出 D-半乳糖胺。在许多细胞里存在催化 UDP-乙酰葡糖胺 UDP-N-乙酞半乳糖胺反应的差向异构酶酶。后者为特异的糖基转移酶的作用，可将 N-乙酰半乳糖胺残基纳入多糖

Biochemical Methods to Determine Cell-Surface Topography: Part A. Labeling of Oxidized Glycoproteins with 3H-Borohydride

. Since most mammalian glycoproteins have a penultimate galac tose or N -acetylgalactosamine residue followed by sialic acid, the latter is removed by simultaneous incubation in neuraminidase, rendering the galactose and galactosamine residues available to the enzymatic

Structural Determination of O-Glycans by Tandem Mass Spectrometry

Trans -sialidase (TS; E.C. 3.2.1.18) catalyzes the transfer of preferably α2,3-linked sialic acid to another glycan or glycoconjugate, forming a new α2,3-linkage to galactose or N -acetylgalactosamine. In the absence of an appropriate