A natural long-chain polymer, chitin is the main component of the
cell walls of fungi, the exoskeletons of arthropods (including
crustaceans and insects), the radulas of mollusks, and the beaks
and internal shells of cephalopods. However, marine crustacean
shells are the primary sources of the chitin derivative chitosan.
Chitin and chitosan are useful for various biological and
biomedical applications, although they have been limited by... more...