Monooxygenase activities of wild-type and mutant strains toward phenol. Growing cells of wild-type 12523 and mc2155, the deletion mutant mc2155 ΔmimA, and the complemented strains mc2155 ΔmimA (mimAsm) and mc2155 ΔmimA (mimAgo), which were induced with acetone, were reacted with phenol, and the monooxygenation product hydroquinone was quantified using HPLC. Bars represent the averages from three independent experiments, and error bars represent the standard deviations from the means.