1) Where is chitin found and what is it's structure?
2) How is chitin degraded?
1) Chitin is found in the cell walls of fungi and the exoskeletons of insects and crustaceans. Chitin is poly-β-1,4-N-acetylglusoamine and is second most abundant polymer on earth next to cellulose.
2) Chitinase breaks the β-1,4 linkage producing monomers of N-acetylglucosamine. Chitin deacetylase removes the acetyl group producing chitosan, which hydrolyzed to glucosamine by chitinase.