Hexosamines are amino sugars that are formed by the substitution of an amino group for a hydroxyl group in a hexose sugar, playing crucial roles in various biological processes such as glycoprotein synthesis and protein folding.

An enzyme that catalyzes the synthesis of fructose-6-phosphate plus GLUTAMINE from GLUTAMATE plus glucosamine-6-phosphate.

Glucosamine is a naturally occurring amino sugar that plays a crucial role in the formation and maintenance of various tissues, particularly in the synthesis of proteoglycans and glycosaminoglycans, which are essential components of cartilage and synovial fluid in joints.

SUGARS containing an amino group. GLYCOSYLATION of other compounds with these amino sugars results in AMINOGLYCOSIDES.

The largest class of organic compounds, including STARCH; GLYCOGEN; CELLULOSE; POLYSACCHARIDES; and simple MONOSACCHARIDES. Carbohydrates are composed of carbon, hydrogen, and oxygen in a ratio of Cn(H2O)n.

Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins.