An exo-l,6-卤-glucosidase (EC 3.2.1.70) (glucodextranase) produced extraceUularly by Arthrobacter globiformis I42 was found to invert the configuration of glucose released from dextran, and to require calcium for protection against warming. Among isomaltodextrins used as substrates for this ...
α-Glucosidase and glucoamylase are essentially distinguished by releasing α-glucose and β-glucose, respectively, from the common substrates having α-glucosidic linkage. The distinction in the substrate specificities of the two enzymes was explained by the subsite affinities in their active sites. ...
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(1,4-D-glucan maltohydrolase, EC 3.2.1.2) are exoenzymes that hydrolyze the alpha-1,4 glycosidic bonds of starch, from the non-reducing end, releasing mainly units of maltose with the inversion of the configuration of anomeric carbon from alpha to beta. These enzymes act on amylose, ...
It is the second member of an important biochemical series of glucose chains. The addition of another glucose unit yields maltotriose ; further additions will produce dextrins and eventually starch.It can be broken down into two glucose molecules by hydrolysis. In living organisms, the enzyme ...
beta-Amylases (1,4-D-glucan maltohydrolase, EC 3.2.1.2) are exoenzymes that hydrolyze the alpha-1,4 glycosidic bonds of starch, from the non-reducing end, releasing mainly units of maltose with the inversion of the configuration of anomeric carbon from alpha to beta. These enzymes act on...
4-glycosidic bonds. The reducing end glucose residue of the hydrolysis product is in the alpha configuration, hence the name alpha-Amylase. Microorganisms such as Bacillus subtilis, Aspergillus niger, Aspergillus oryzae, and Rhizopus produce this enzyme. Like other enzymes, alpha-Amylase exhibits ...
studies have shown that there is a close relationship between the structure ofC. sinensispolysaccharides and their pharmacological activities. Changes inmonosaccharidecomposition, molecular weight and configuration may be the key to affecting pharmacological activity. Of course, this also implies that it is...
and glucose-6-phosphatase (seeFig. 98-1,B[a], upper scheme). High-affinity GRE binding requires receptordimerizationand is short lived because the receptor rapidly cycles on and off target sites every few seconds.13,14Uponbinding DNA, GR undergoes a conformational change that results...
An enantiomer can be characterized by the absolute configuration of its asymmetric center and is described by the R- and S-sequencing rules of Cahn and Prelog, or by the manner in which the molecule rotates the plane of polarized light and designated as dextrorotatory or levorotatory (i.e.,...