Glucosamine vs. Glutamine

(biochemistry) An amino derivative of glucose that is a component of polysaccharides such as chitin; it is marketed as a dietary supplement supposedly to reduce the symptoms of arthritis.

Glucosamine (C6H13NO5) is an amino sugar and a prominent precursor in the biochemical synthesis of glycosylated proteins and lipids. Glucosamine is part of the structure of two polysaccharides, chitosan and chitin.

(amino acid) A nonessential amino acid C5H10N2O3 found in most animal and plant proteins.

a crystalline amino acid occurring in proteins; important in protein metabolism

Glutamine (symbol Gln or Q) is an α-amino acid that is used in the biosynthesis of proteins. Its side chain is similar to that of glutamic acid, except the carboxylic acid group is replaced by an amide.