Growth Moderation in Slow-growing Mutants of Escherichia coli

Growth response of Escherichia coli to nutritional shift-up: immediate division stimulation in slow-growing cells.

When Escherichia coli 15T- cells growing exponentially at 70- to 80-min doubling times are subjected to a nutritional shift-up via glucose addition, cell division continues at the preshift rate for about 70 min (rate maintenance). The same cells growing at doubling times of 120 min or longer, however, begin to divide at a new faster rate immediately upon glucose addition. In both the rate maint...

Mutants of Escherichia coli with High Minimal Temperatures of Growth.

O'Donovan, Gerard A. (University of California, Davis), Catherine L. Kearney, and John L. Ingraham. Mutants of Escherichia coli with high minimal temperatures of growth. J. Bacteriol. 90:611-616. 1965.-Three general classes of mutants showing increased minimal temperatures of growth have been isolated from Escherichia coli. These mutants do not grow at temperatures below 20 C, although their pa...

Mucoid mutants of Escherichia coli.

The WV strain of Escherichia coli has been used extensively in analyzing various biosynthetic pathways (Davis, 1952a) and also in studying drug resistance (Davis, 1952b). This strain is nonmucoid as ordinarily cultured on solid medium at 35 C. However, among mutants selected for various properties, i. e., auxotrophy, meiotrophy4 and drug resistance, a few were observed to be mucoid. An investig...

Growth Studies of Three OX 174 Mutants in tsDNA Mutants of Escherichia coli

Three mutants of OX174 were examined for their abilities to grow in temperature-sensitive dnaA, dnaC, dnaE, or dnaG mutants of Escherichia coli. The results indicate that the phage mutants have acquired the ability to grow in some tsDNA mutants that normally block the replication of wild-type OX174. Evidence is presented indicating that the phage mutants contain one or more altered structural p...

Dowell Escherichia coli . 174 mutants in tsDNA mutants Growth studies of three phi