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The gene mntH is strongly induced in aerobically growing Hpx- cells. Cells bearing a mntH’-lacZ fusion were grown in anaerobic defined medium (glucose/amino acids) and aerated at time zero. At intervals β-galactosidase was assayed. This experiment is representative of four independent replicates. AA183 (wild-type, circles) and AA191 (Hpx-, squares).
