Fig. 6.

(A) Schematic of λ host recognition gene J of three genotypes and relict prophage genes (ECB_00511, ECB_00512, and ECB_00513) in host REL606 genome. The yellow lines indicate point mutations (C2999T, A3034G, T3230C, C3310T, G3319A, T3321A, and A3364T). The dark green boxes indicate the recombined segment from ECB_00512 (see alignment in SI Appendix, Fig. S8). The light green boxes indicate adjacent prophage genes that did not recombine. (B) Increase in exponential growth rate of recombinant λ, relative to prerecombination λ, when competing for three different E. coli host genotypes. The letters (i and ii) indicate groups that are statistically similar. The dashed line indicates where growth rate of the recombinant is equal to prerecombination λ.