Efficient suppression of the requirement for N function of bacteriophage λ by a rho-defective E. coli suA mutant

Abstract
The E. coli suA mutant (T82), which is a suppressor of polarity by virtue of its impaired transcription termination factor (rho) activity, is shown to be an efficient suppressor of λN mutants. The relief of the N requirement by this host is reflected in a substantial restoration of growth and N-dependent β-galactosidase expression as well as in a partial relief of polarity of N-defective phages.