High Quality Content by WIKIPEDIA articles! N-Acetylgalactosamine (GalNAc), is an amino sugar derivative of galactose. In humans it is the terminal carbohydrate forming the antigen of blood group A. It is typically the first monosaccharide that connects serine or threonine in particular forms of protein O-glycosylation. N-Acetylgalactosamine is necessary for intercellular communication, and is concentrated in sensory nerve structures of both humans and animals. In chemistry, an amino sugar contains an amine group in place of a hydroxyl group. Derivatives of amine containing sugars, such as N-acetylglucosamine and sialic acid, while not formally containing an amine, are also considered amino sugars. Aminoglycosides are a class of antimicrobial compounds that inhibit bacterial protein synthesis. These compounds frequently contain amino sugars (but in some cases contain aminocyclitols).

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