FIG. 2.

Aerobic growth of S. mutans wild-type strain GS-5 and the ΔahpC Δnox-1, Δnox-2, and ΔahpC Δnox-1 Δnox-2 mutants on glucose and on mannitol agar plates. (A) Colonial morphologies of wild-type (a), ΔahpC Δnox-1 (b), Δnox-2 (c), and ΔahpC Δnox-1 Δnox-2 (d) cells aerobically grown on TYG plates, incubated at 37°C for 60 h; (B) colonial morphologies of wild-type (e), ΔahpC Δnox-1 (f), Δnox-2 (g), and ΔahpC Δnox-1 Δnox-2 (h) cells aerobically grown on TYM plates, incubated at 37°C for 60 h.