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Table 1 λ plaque formationa

From: Recombination Phenotypes of Escherichia coli greA Mutants

Host genotypeb λ wild λ gam λ red
wild type ++ + +
greA-D41N + - +
greA-D41A + - +
greA-E44K + - +
greAΔ ++ + +
greBΔ ++ + +
greBΔ greA-D41N + - +
  1. a. ++ large plaques, + small plaques, - no plaques
  2. b. All strains bear a recAΔtet substitution.