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:
Aug. 07, 2007
Filed:
Dec. 17, 2004
Applicants:
Qiong Cheng, Wilmington, DE (US);
Luan Tao, Claymont, DE (US);
Henry Yao, Boothwyn, PA (US);
Inventors:
Assignee:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12N 1/20 (2006.01); C12N 9/02 (2006.01); C07H 21/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
Novel CrtW carotenoid ketolase are provided that are useful for the production of ketocarotenoids. The ketolases genes of the present invention exhibit low homology in comparison to other CrtW ketolases previously reported. Expression of the carotenoid ketolases in heterologous hosts enabled production of canthaxanthin and astaxanthin. Coexpression experiments using divergent crtW genes resulted in increased production of the desired ketocarotenoids.