General recombination in Escherichia coli K-12: In vivo role of RecBC enzyme

S. D. Yancey, R. D. Porter

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Heterozygous lacZ- merodiploids of Escherichia coli K-12 have been used to study the role of the RecBC enzyme in general recombination. The transcribable intermediate assay detects the product of early steps in recombination without requiring the formation of viable recombinant colonies. Recombination is initiated by infection with λ precA+. We have found that transcribable intermediate formation in crosses between F42 lac and chromosomal lac is dependent on F fertility functions and an active RecBC enzyme. Thus, the products of the RecB and RecC genes are required in early steps of recombination between these two substrates. Introduction of the F42 lac donor DNA by conjugation immediately after infection with λ precA+ abolishes the requirement for an active RecBC enzyme.

Original languageEnglish (US)
Pages (from-to)29-34
Number of pages6
JournalJournal of bacteriology
Issue number1
StatePublished - 1985

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Molecular Biology


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