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Cellobiose is a disaccharide with the formula (C 6 H 7 (OH) 4 O) 2 O. It is classified as a reducing sugar - any sugar that possesses the ability or function of a reducing agent. The chemical structure of cellobiose is derived from the condensation of a pair of β-glucose molecules forming a β(1→4) bond. It can be hydrolyzed to glucose ...
In enzymology, a cellobiose phosphorylase (EC 2.4.1.20) is an enzyme that catalyzes the chemical reaction. cellobiose + phosphate alpha-D-glucose 1-phosphate + D-glucose. Thus, the two substrates of this enzyme are cellobiose and phosphate, whereas its two products are alpha-D-glucose 1-phosphate and D-glucose.
This enzyme catalyses the hydrolysis of (1→4)-β-D-glucosidic linkages in cellulose and cellotetraose, releasing cellobiose from the non-reducing ends of the chains.. CBH1 from yeast, for example, is composed of a carbohydrate binding site, a linker region and a catalytic domain. [6]
In enzymology a cellobiose epimerase (EC 5.1.3.11) is an enzyme that catalyzes the chemical reaction cellobiose ⇌ {\displaystyle \rightleftharpoons } D-glucosyl-D-mannose Hence, this enzyme has one substrate , cellobiose , and one product , D-glucosyl-D-mannose .
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In Escherichia coli, the chb operon is involved with the utilization of cellobiose and β-glucosides chitobiose. The chbG gene of the chb Operon encodes a chitooligosaccharide deacetylase. [ 7 ] The chb operon is also responsible for coding the ChbR regulator, which is responsible for activating transcription when chitobiose is available.
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Two decades of evolution of mobile phones, from a 1992 Motorola DynaTAC 8000X to the 2014 iPhone 6 Plus. A mobile phone, or cell phone, [a] is a portable telephone that allows users to make and receive calls over a radio frequency link while moving within a designated telephone service area, unlike fixed-location phones (landline phones).