Glycoside hydrolase family 9
Encyclopedia
In molecular biology, glycoside hydrolase family 9 is a family
Protein family
A protein family is a group of evolutionarily-related proteins, and is often nearly synonymous with gene family. The term protein family should not be confused with family as it is used in taxonomy....

 of glycoside hydrolases
Glycoside hydrolase
Glycoside hydrolases catalyze the hydrolysis of the glycosidic linkage to release smaller sugars...

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Glycoside hydrolases  are a widespread group of enzymes that hydrolyse the glycosidic bond
Glycosidic bond
In chemistry, a glycosidic bond is a type of covalent bond that joins a carbohydrate molecule to another group, which may or may not be another carbohydrate....

 between two or more carbohydrates, or between a carbohydrate and a non-carbohydrate moiety. A classification system for glycoside hydrolases, based on sequence similarity, has led to the definition of >100 different families. This classification is available on the CAZy(http://www.cazy.org/GH1.html) web site, and also discussed at CAZypedia, an online encyclopedia of carbohydrate active enzymes.

Glycoside hydrolase family 9 CAZY GH_9 comprises enzymes with several known activities including endoglucanase  and cellobiohydrolase . These enzymes were formerly known as cellulase family E. Cellulases (Endoglucanases) catalyse the endohydrolysis of 1,4-beta-D-glucosidic linkages in cellulose.
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