ISSN:
1476-5535
Keywords:
Living cell reaction process
;
l-Isoleucine production
;
l-Valine production
;
Brevibacterium flavum
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Summary A new process (Living Cell Reaction Process) forl-isoleucine production using viable, non-growing cells ofBrevibacterium flavum AB-07 was optimised using ethanol as the energy source and α-ketobutyric acid (α-KB) as precursor.l-valine also could be produced from glucose at high yield by this process. This process differs from the usual fermentation method in that non-growing cells are used, and the production ofl-isoleucine andl-valine were carried out under conditions of repressed cell division and growth. Minimal medium missing the essential growth factor, biotin was employed as the reaction mixture for the production ofl-isoleucine andl-valine. The productivity ofl-isoleucine andl-valine were 200 mmol·l−1 · day−1 (molecular yield to α-KB: 95%) and 300 mmol · l−1 · day−1 (molecular yield to glucose: 80%) respectively. The content ofl-isoleucine andl-valine in total amino acids produced in the each mixture were 97% and 96% respectively.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01578203
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