Genetic recombination in Escherichia coli

Genetic recombination in Escherichia coli: the role of exonuclease I.

The indirect suppression of recB(-) and recB(-)recC(-) mutations by the sbcB(-) allele is caused by the loss of a nuclease active on denatured DNA. Results from enzyme purifications and studies with a specific antiserum demonstrate that the activity present in sbcB(+) strains, and lost in sbcB(-) strains, is exonuclease I. It is likely that sbcB is the structural gene for exonuclease I. The los...

:IBi Genetic recombination: the sexual process In Escherichia coli

Gene Recombination in Escherichia coli

AKALYSIS of mixed cultures. sf nutritional mutants has revctlled the presence of new types which strongiy suggest the occurrence of a sexual process in the bacterium; EsciumcJ~ia coti. The mutants consist of strains which differ from their parent wild type, strain I.-l’& in lacking the ahilitv to synthesize growth-factors. . As a result of these dejiciencies they <ill only grow in media supplem...

Gene Recombination in Escherichia coli

rospect, (1) it must be judged to have been technically achievable at an earlier time with methods then available; (2) it must be judged to have been understandable, capable of being expressed in terms comprehensible to working scientists at the time; and (3) its implications must have been capable of having been appreciated. g In an era of Big Science, with goals such as the conquest of cancer...

Genetic Recombination between Escherichia Coli and Salmonella Typhimurium.

27 Libby, W. F., "Radioactive Strontium Fallout," these PROCEEDINGS, 42, 365-390 (1956). 28 Libby, W. F., "Current Research Findings on Radioactive Fallout," these PROCEEDINGS, 42, 945-962 (1956). 29 Libby, W. F., "Radioactive Fallout," these PROCEEDINGS, 43, 758-775 (1957). 30 Public Hearings on Fallout from Nuclear Weapons Tests, Testimony before the Special Committee on Atomic Energy, Specia...