S. aureus requires mntE for growth in the presence of excess Mn. (A) S. aureus strains streaked onto TSA plates supplemented with 0, 0.5, and 1.0 mM MnCl2. (B) Growth as measured by OD600 over time for S. aureus strains in TSB medium supplemented with 0, 0.5, or 1.0 mM MnCl2. The data are the average of the means from three independent experiments each in biological triplicate with the standard error of the mean shown. (C) Growth as measured by OD600 over time for S. aureus strains containing either an empty plasmid (pOS1 Plgt [p.Plgt]) or a plasmid containing constitutively expressed mntE (pOS1 PlgtmntE [p.PlgtmntE]) in TSB supplemented with 1 mM MnCl2. The data are the average of the means from three independent experiments, each in biological triplicate with the standard error of the mean shown.