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FIG. 4.

FIG. 4

Hyperbaric oxygen sensitivity of wild-type and regulatory mutants. Strains were grown on brain heart infusion agar overnight. Replicas were made, and the plates were incubated for 6 h in ambient atmosphere (control) or hyperbaric O2 (100% oxygen at 25 atm) and then grown for an additional 18 h in ambient atmosphere at 37°C.