chitin, chemical structure. chitin is a polymer of n-acetylglucosamine and is present in the exoskeletons of insects, crustaceans.

chitin chemical structure polymer present exoskeletons insects crustaceans nacetylglucosamine cell wall fungi insect crab lobster scale animal polysaccharide chitinase acetylglucosamine plastic monomer molecule atoms atomic model molecular synthetic strand particle formula line drawing skeletal flat icon chemistry science vector etc