Evidence for an essential histidine residue in d-xylose isomerases

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Localization of the essential histidine and carboxylate group in D-xylose isomerases.

D-Xylose isomerases from different bacterial strains were chemically modified with histidine and carboxylate-specific reagents. The active-site residues were identified by amino acid sequence analysis of peptides recognized by differential peptide mapping on ligand-protected and unprotected derivatized enzyme. Both types of modified residues were found to cluster in a region with consensus sequ...

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Differences 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)...

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ژورنال

عنوان ژورنال: Biochemical Journal

سال: 1988

ISSN: 0264-6021,1470-8728

DOI: 10.1042/bj2500153