منابع مشابه
Crystallographic studies of D-xylose isomerase.
* This work was supported by National Institutes of Health Grants CA-10925, CA-OG927, and RR-05539 from the United States Public Health Service and by an appropriation from the Commonwealth of Pennsylvania. (I), was crystallized from acetone. The enzyme from Bacillus coagulans has also been crystallized from ammonium sulfate solution and from aqueous acetone (3). We describe here preliminary x-...
متن کاملEvolution in reverse: engineering a D-xylose-specific xylose reductase.
Xylitol (1) is a pentitol and is used not only as a sweetener but also as a platform chemical for the production of industrially important chemicals. As a sweetener, it has been shown to possess several favorable properties in comparison to other sugar substitutes, such as anticariogenicity, good gastrointestinal tolerance, low caloric content, and minimal insulin dependence for metabolism. As ...
متن کاملThe 5 G. D-xylose Absorption Test.
The 5 g. d-xylose absorption test has been studied in 50 normal subjects. The five-hour urinary xylose content was 1.75 +/- 0.43 g. Xylose absorption was more rapid and more complete with the 5 g. than with the 25 g. test. Comparative studies showed the results of the two tests to be significantly related, but the 5 g. test was a less sensitive indicator of malabsorption than the 25 g. test. Th...
متن کاملDifferences in Intestinal Absorptive Capacity of Chickens for D-Xylose
Background: According to literature, there are differences among different species of animals in respect to absorption of D-xylose. OBJECTIVES: In two experiments, the differences that might exist in absorptive capacity of small intestine for D-xylose, in different types of chicken were tested. METHODS: In experiment one, 2 groups of nine adult layer type males (48 weeks) and females (58 weeks)...
متن کاملProton magnetic relaxation studies of the interaction of D-xylose and xylitol with D-xylose isomerase. Characterization of metal-enzyme-substrate interactions.
The interaction of D-xylose isomerase purified from two sources with Mn2+ and D-xylose or the competitive inhibitor xylitol has been examined by nuclear magnetic resonance. A greater paramagnetic effect of enzyme-bound Mn2+ on the alpha anomer of D-xylose than on the beta anomer was observed, providing independent evidence for the specificity of D-xylose isomerase for the alpha anomeric form of...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1964
ISSN: 0002-1369,1881-1280
DOI: 10.1271/bbb1961.28.184