AskDefine | Define cellobiose

User Contributed Dictionary

English

Noun

  1. A disaccharide, found only as a repeat unit in cellulose, in which two glucose units are joined with a 1, 4-β linkage

Extensive Definition

Cellobiose is a disaccharide with the formula [HOCH2CHO(CHOH)3]2O. The molecule is derived from the condensation of two glucose molecules linked in a β(1→4) bond. It can be hydrolyzed by bacteria or cationic ion exchange resins to give glucose. Cellobiose has eight free alcohol (COH) groups and three ether linkages, which give rise to strong -inter- and intra-molecular hydrogen bonds
It can be obtained by enzymatic or acidic hydrolysis of cellulose and cellulose rich materials such as cotton, jute, or paper. Cellulose is a polymer of glucose units linked by β(1→4) bonds.
Treatment of cellulose with acetic anhydride and sulfuric acid, gives cellobiose tetraacetate, which cannot engage in hydrogen bonding and is soluble in nonpolar organic solvents.

References

cellobiose in German: Cellobiose
cellobiose in Spanish: Celobiosa
cellobiose in French: Cellobiose
cellobiose in Italian: Cellobiosio
cellobiose in Dutch: Cellobiose
cellobiose in Japanese: セロビオース
cellobiose in Polish: Celobioza
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