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:
Jun. 29, 1999
Filed:
Jan. 09, 1998
Applicant:
Inventors:
Hiroaki Yamamoto, Ibaraki, JP;
Kazuya Mitsuhashi, Ibaraki, JP;
Akinobu Matsuyama, Ibaraki, JP;
Fusao Tomita, Hokkaido, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12P / ; C12P / ;
U.S. Cl.
CPC ...
435108 ; 435170 ; 4352523 ; 435280 ; 4353201 ;
Abstract
The method for producing D-tryptophan with high optical purity and high yield is provided, which comprises contacting a mixture of D,L-tryptophan with organisms which produce tryptophanase to degrade L-tryptophan selectively, thereby increasing the content of D-tryptophan in D,L-tryptophan.