The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 1986
Filed:
Feb. 24, 1984
Kirston E Koths, Berkeley, CA (US);
Robert F Halenbeck, San Rafael, CA (US);
Peter M Fernandes, Walnut Creek, CA (US);
Cetus Corporation, Emeryville, CA (US);
Abstract
Methods for producing substantially pure pyranosone from pyranose, especially glucosone from glucose. A pyranose-2-oxidase enzyme which is free of substantially all glucosone-utilizing enzyme contaminants which are measurably active at a selected pH between about 4.4 and 7.0 is reacted in solution with a pyranose and oxygen to produce the corresponding pyranosone. Hydrogen peroxide co-produced in the reaction is maintained at a concentration below about 10.sup.-3 M, by substantially pure catalase. The reaction is carried out at the selected pH. The methods and reagents are also applicable to producing xylosone from xylose, 5-ketofructose from sorbose, and mixtures of 2-ketogluconic and isoascorbic acid from delta-gluconolactone.