Hostname: page-component-7b7567c8c-fvjsw Total loading time: 0 Render date: 2026-11-14T01:44:16.571Z Has data issue: false hasContentIssue false

Recombination and complementation between R factors in Escherichia coli K 12

Published online by Cambridge University Press:  14 April 2009

T. J. Foster
Affiliation:
Department of Bacteriology, The Medical School, University Walk, Bristol BS8 1TD
T. G. B. Howe
Affiliation:
Department of Bacteriology, The Medical School, University Walk, Bristol BS8 1TD
Rights & Permissions [Opens in a new window]

Summary

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

Recombination between chloramphenicol-sensitive (Cms) mutants of Rl, and R100, has been demonstrated in Escherichia coli K12 rec+; it occurs at reduced frequency in recB and recC, and is not detectable in reeA, indicating that R factor recombination depends on host functions. Some mutants of R1 also recombine with an R100 mutant in a similar way. recA cells carrying an R1 and an R100 Cms mutant (hetero-R state) have a low level of chloramphenicol-resistance, and form a chloramphenicol acetyl transferase that has lower specific activity than enzyme from hosts carrying wild-type or recombinant factors. These results suggest the occurrence of interallelic complementation between mutant R factors.

Information

Type
Research Article
Copyright
Copyright © Cambridge University Press 1971