ISSN:
0006-3592
Keywords:
E. coli HB101[pGEc47]
;
defined medium
;
medium development
;
yield coefficients
;
critical dilution rate
;
batch and continuous cultivation
;
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
This paper shows that differences in growth behavior of Escherichia coli strain HB101 and strain HB101[pGEc47] can be related to yeast extract-enriched medium rather than plasmid properties. An optimal medium for growth of E. coli HB101[pGEc47] was designed based on the individual yield coefficients for specific medium components (NH4+ 6 g g-1, PO43- 14 g g-1, SO42- 50 g g-1). The yield coefficient for l-leucine depends on the glucose content of the medium (20 g g-1 for 3% glucose, 40 g g-1 for 1% glucose) and the yield coefficient for l-proline depends on the cultivation mode (20 g g-1 for batch cultivation, 44 g g-1 for continuous cultivation). Growth on defined medium after medium optimization is as rapid as on complex medium (0.42-0.45 h-1). The critical dilution rate (DR) in the defined medium above which undesired production of acetic acid occurs is in the range of 0.23-0.26 h-1. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 58:92-100, 1998.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
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