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Strontium resistance of wild-type and mutant strains of S. oneidensis. Dose-response curves are presented for wild-type MR-1 (▪); parental DSP10 (•), a spontaneous rifampin-resistant derivative of S. oneidensis MR-1; the SO3032::pKNOCK insertion mutant (□); and the SO3034::pKNOCK insertion mutant (▵). The means ± standard errors (bars) from three independent determinations are shown; three independent experiments were conducted.
