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Lysozyme

(Science: cell biology, enzyme) Glycosidase that hydrolyses the bond between N acetyl muramic acid and N acetyl glucosamine, thus cleaving an important polymer of the cell wall of many bacteria. Present in tears, saliva and in the lysomes of phagocytic cells, it is an important antibacterial defence, particularly against gram-positive bacteria. An enzyme found in saliva and sweat and tears that destroys the cell walls of certain bacteria.An enzyme capable of breaking down cell walls that is used in the immune system to eliminate foreign microbes with its powerful digestive properties.