Braun-Breton C, Hofnung M. Explanations accounting for transduction by bacteriophage lambda in maltose negative bacteriophage lambda resistant mutants of Escherichia coli K-12.
MOLECULAR & GENERAL GENETICS : MGG 1978;
159:143-9. [PMID:
345088 DOI:
10.1007/bf00270887]
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Abstract
Entry of DNA from lambda phages particles into lambdarMAl- mutants of Escherichia coli K-12 is shown to be due to two distinguishable processes. One, residual transduction, results from a low level expression of lamB. The other one, background transduction, is independent of gene lamB. Interpretations are presented for these results. It is propos that residual transduction is due to a weak promoter pB3 located within or near the distal part of the gene preceeding lamB in the same operon. It is proposed that background transduction is due to a secondary receptor structure for phage lambda. Finally a tentative hypothesis relatin pB3 to insertion sequences is presented.
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