The Structural Macromolecules
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Chitin is the most abundant organic skeletal component of invertebrates. It is the characteristic polysaccharide of several major phyla (Arthropoda, Annelida, Mollusca, and Coelenterata) and also functionally replaces cellulose in many fungi. It has been estimated that the Copepoda alone may synthesize 109 tons of chitin annually, in comparison with the calculated total world-wide production of 1011 tons of cellulose (Tracey, 1957). In arthropods chitin is never found free of protein.
KeywordsCuticular Lipid Cuticular Protein Meridional Reflection Chitin Synthetase Chitin Chain
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