β-Glucosidase Catalyzed Syntheses of Pyridoxine Glycosides
作者:Rajachristu Einstein CHARLES、Soundar DIVAKAR
DOI:10.1271/bbb.80463
日期:2009.1.23
Enzymatic syntheses of pyridoxine glycosides were carried out in di-isopropyl ether organic medium using β-glucosidase isolated from sweet almond. Optimum conditions determined for the reaction with d-glucose were 40% (w/w d-glucose) β-glucosidase at 0.18 mm (1.8 ml) of pH 5 acetate buffer over a 72 h incubation period. Of 11 carbohydrates employed, β-glucosidase gave 7-O-(α-d-glucopyranosyl)pyridoxine 5a, 7-O-(β-d-glucopyranosyl)pyridoxine 5b, 6-O-(α-d-glucopyranosyl)pyridoxine 5c, 7-O-(α-d-galactopyranosyl)pyridoxine 6a, 7-O-(β-d-galactopyranosyl)pyridoxine 6b, 6-O-(α-d-galactopyranosyl)pyridoxine 6c, 7-O-(α-d-mannopyranosyl)pyridoxine 7a, 7-O-(β-d-mannopyranosyl)pyridoxine 7b, and 6-O-(α-d-mannopyranosyl)pyridoxine 7c in yields ranging from 23 to 40%.
Specificity of a particulate glucosyltransferase in seedlings of Pisum sativum L. which catalyzes the formation of 5'-O-(.BETA.-D-glucopyranosyl)pyridoxine.
作者:Kenjiro TADERA、Fumio YAGI、Akira KOBAYASHI
DOI:10.3177/jnsv.28.359
日期:——
D-glucose from UDP-glucose to the 5'-hydroxyl group of pyridoxine, was isolated as a particulate enzyme from seedlings of podded pea (Pisum sativum L. cv. Kinusaya). The enzyme required additional Mg2+ for its function. The pH optimum for glucosylation of pyridoxine was between 7.8 and 8.8. The enzyme showed high specificity for UDP-glucose and relative specificity for glucosyl acceptor: pyridoxine was replaceable
Method for the determination of the concentration of vitamin B6 in a sample
申请人:Bühlmann Laboratories AG
公开号:EP2533053A1
公开(公告)日:2012-12-12
The invention relates to methods for the determination of vitamin B6 in samples as well as to reagent compositions for assaying a sample for vitamin B6 and to a test kit suitable for carrying out the methods according to the present invention. Further, the invention relates to the use of such methods for the application to different analyzing devices such as microtiter plate readers and fully automated clinical chemistry analyzers (autoanalyzers).
METHOD FOR THE DETERMINATION OF THE CONCENTRATION OF VITAMIN B6 IN A SAMPLE
申请人:Weber Jakob
公开号:US20140308691A1
公开(公告)日:2014-10-16
The invention relates to methods for the determination of vitamin B6 in samples as well as to reagent compositions for assaying a sample for vitamin B6 and to a test kit suitable for carrying out the methods according to the present invention. Further, the invention relates to the use of such methods for the application to different analyzing devices such as micro-titer plate readers and fully automated clinical chemistry analyzers (autoanalyzers).