FIG. 5.
Complementation of an ahpCF-deficient E. coli strain by S. mutans alkyl hydroperoxide reductase proteins. The zone of inhibition by 3% H2O2 or 3% cumene hydroperoxide (CHP) for E. coli TA4315 (ΔahpC ΔahpF) transformed with vector plasmid pUC119, pNox-1H containing nox-1, pMS1 containing ahpC, and pAN119 containing nox-1 and ahpC were compared with those of E. coli TA4315 as the sensitive control and E. coli K-12 (parent strain).