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. 06, 1995
Filed:
Mar. 05, 1993
Applicant:
Inventors:
Assignee:
Toray Industries, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C12P / ; C12N / ;
U.S. Cl.
CPC ...
435116 ; 4352551 ; 4352541 ; 435911 ; 435938 ; 435921 ; 435944 ;
Abstract
A high concentration of DL-alanine can be supplied in a culture medium and D-alanine can be efficiently obtained with high yield for a short time by cultivating a yeast which belongs to the genus Candida, the genus Cryptococcus, the genus Hansenura or the genus Trichosporon and has an ability to assimilate L-alanine and not to assimilate substantially D-alanine in a culture medium containing substantially DL-alanine as a single carbon source and a single nitrogen source under an acidic condition. Moreover, because very little other organic by-product and organic impurity exists in the culture medium when the cultivation is completed, it becomes easy to separate and refine the D-alanine.