Chitosan

Chitosan is a product of n-deacetylated chitin. Chitin, chitosan and cellulose have similar chemical structure. Cellulose is hydroxyl at C2 position, chitin and chitosan are replaced by an acetyl and an amino group at C2 position, respectively.Chitin and chitosan have many unique properties such as biodegradability, cell affinity and biological effect, especially chitosan containing free amino group, which is the only basic polysaccharide in natural polysaccharides