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. 2020 Jul 15;47(4):301–304. doi: 10.5999/aps.2020.00731

Fig. 1. Hyaluronic acid monomer unit.

Fig. 1.

Hyaluronic acid is a polysaccharide that consists of D-glucuronic (left) acid and D-N-acetylglucosamine (right) disaccharide units. They are bound together by a β-1,3 glycosidic bond. Additionally, two disaccharide units are linked by a β-1,4 glycosidic bond.