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Cobaltous Ion Effect on Diauxie
- Source :
- Journal of Bacteriology; December 1969, Vol. 100 Issue: 3 p1194-1197, 4p
- Publication Year :
- 1969
-
Abstract
- Cobaltous ions extended the duration of the diauxic lag in Escherichia coliK-12. Growth in glucose in the presence of Co++was necessary for the effect. Medium in which cells had been grown in the presence of Co++produced an extended lag when inoculated with fresh cells and lactose. Valine was found in this medium. Reversal of the extended lag was brought about by addition of l-isoleucine and related l-amino acids, but not by several metal ions. Cobaltous ion does not inhibit β-galactosidase or the galactoside permease. These results, together with the known growth sensitivity of K-12 to valine, indicate that Co++disturbs the normal valine-isoleucine balance.
Details
- Language :
- English
- ISSN :
- 00219193 and 10985530
- Volume :
- 100
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Journal of Bacteriology
- Publication Type :
- Periodical
- Accession number :
- ejs57578153
- Full Text :
- https://doi.org/10.1128/jb.100.3.1194-1197.1969