N-乙酰-D-半乳糖胺(GalNAc)是一种氨基糖,是许多O-连接和N连接聚糖结构的组分。 作为UDP-GalNAc,GalNAc是许多蛋白质糖基化丝氨酸和苏氨酸残基的起始O-连接糖。D-N-Acetylgalactosamine 是一种内源性代谢产物。;N-Acetyl-D-galactosamine (GalNAc), an aminosugar, is a component of many O-linked and N-linked glycan structures. As UDP-GalNAc, GalNAc is the intial O-linked sugar to many serine and threonine residues in protein glycosylations.D-N-Acetylgalactosamine is an endogenous metabolite.