Now showing items 11-20 of 50
Cooperative effects of bacterial mutations affecting [lambda] N gene expression : II. Isolation and characterization of mutations in the rif region
(Elsevier, 1976-08)
We report the isolation and initial characterization of a class of mutations, Snu, that map near the rif locus on the Escherichia coli chromosome. Snu mutations inhibit the growth of phage [lambda], an effect primarily ...
Temperature dependent alteration in bacterial protein composition
(Elsevier, 1975-02-03)
When different strains of or are grown at 30[deg] or at 42[deg] and their proteins are compared using SDS-polyacrylamide gel electrophoresis, differences are observed in the protein composition of the cells. In particular, ...
Patterns of protein synthesis in E. coli: a catalog of the amount of 140 individual proteins at different growth rates
(Elsevier, 1978-05)
The amount of 140 individual proteins of E. coli B/r was measured during balanced growth in five different media. The abundance of each protein was determined from its absolute amount in 14C-glucose-minimal medium and a ...
Gene N regulator function of phage [lambda]imm21: Evidence that a site of N action differs from a site of N recognition
(Elsevier, 1973-12-25)
We report the isolation and characterization of a new mutation in the hybrid phage [lambda]imm21. Both genetic and physiological studies demonstrate that this new mutation, N21-1, is similar to N mutations of phage [lambda]. ...
Buoyant densities of DNA from various strains of Streptococcus mutans
(Elsevier, 1972-06)
The buoyant densities of eight strains of Streptococcus mutans were determined by analytical ultracentrifugation in caesium chloride. The results were as follows (in g/cm3): K-1-R(1.7044); SL-1(1.7040); E-49(1.7010); ...
Evaluation of Kanamycin as an aid in the isolation of Bacteroides melaninogenicus from dental plaque
(Elsevier, 1971-07)
Dental plaque known to harbour Bacteroides melaninogenicus was removed from the gingival half of selected buccal tooth surfaces. The plaque was dispersed, diluted and cultured on medium containing 0 per cent, 0.05, 0.1 and ...
Isolation of mutants of Escherichia coli lacking NAD- and NADP-linked malic enzyme activities
(Elsevier, 1975-07-22)
SummaryWhen Escherichia coli utilizes C4-dicarboxylic acids as sole sources of carbon and energy for growth, phosphoenolpyruvate is synthesized by means of phosphoenolpyruvate carboxykinase or by sequential action of malic ...
A criterion for using chloramphenicol to define different processes in the initiation of DNA synthesis in bacteria
(Elsevier, 1974-07)
A criterion is proposed which must be met in order to demonstrate that two different proteins are required for the initiation of DNA synthesis, with each protein being synthesized at a different time prior to initiation, ...
Feedforward inhibition in biosynthetic pathways: inhibition of the aminoacyl-tRNA synthetase by intermediates of the pathway
(Elsevier, 1979-04-21)
The stability of an amino acid biosynthetic pathway controlled by end-product inhibition is significantly improved if, in addition, the corresponding aminoacyl-tRNA synthetase is inhibited by an intermediate in the pathway. ...