Fig. 3.

RecU depletion in 8325-4recUi strain leads to increased susceptibility to UV damage. Cultures of control strain BCBHV008 and recU inducible mutant 8325-4recUi showing serial dilutions from 10⁻² (left) to 10⁻⁵ (right). 10 μl spots were placed on TSA agar, containing or not IPTG, and irradiated with a UV dose of 4 J/m²/s for 0, 10, 20, 30 and 60 s. Plates were then incubated overnight at 37 °C