Method for producing D-alanine
US5422255A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1993 |
| Grant date | Jun 6, 1995 |
| Priority date | — |
| Expiry date | Mar 5, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/944
- WIPO fieldBiotechnology
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.