Chitin
Chitin (C8H13O5N)n ( /ˈkaɪtɨn/) is a long-chain polymer of a N-acetylglucosamine, a derivative of glucose, and is found in many places throughout the natural world. It is the main component of the cell walls of fungi, the exoskeletons of arthropods such as crustaceans (e.g., crabs, lobsters and shrimps) and insects, the radulas of mollusks, and the beaks and internal shells of cephalopods, including squid and octopuses. In terms of structure, chitin may be compared to the polysaccharide cellulose and, in terms of function, to the protein keratin. Chitin has also proven useful for several medical and industrial purposes.
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Famous quotes containing the word chitin:
“We New Yorkers see more death and violence than most soldiers do, grow a thick chitin on our backs, grimace like a rat and learn to do a disappearing act. Long ago we outgrew the need to be blowhards about our masculinity; we leave that to the Alaskans and Texans, who have more time for it.”
—Edward Hoagland (b. 1932)