Swarming complementation test. (A) E. coli JMG1655 ΔrecA (pCA24N) and JMG1655 ΔrecA (pRecA-Htg) strains. (B) E. coli JMG1655ΔrecA (pCA24N) and JMG1655ΔrecA (pRecA::GFP) strains. (C) E. coli RP437ΔrecA (pCA24N) and RP437 ΔrecA (pRecA-Htg) strains. Plates were photographed after 24 h of development at 37°C. Plates have a diameter of 9 cm.