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Growth of finR mutants with sulfate or cystine as sole sulfur sources. (A) M9 succinate medium with 1 mM sulfate as sulfur source; (B) M9 succinate medium with 0.5 mM cystine as sulfur source. Symbols: ○, DSM 3601 (WT); ◆, BK8 (Pvd− parental); ▲, TA690 (ΔfinR::Gmr-forward); ■, TA691 (ΔfinR::Gmr-reverse); ●, SO3B9 (finR::mini-Tn5KmxylE). The data are means of triplicate cultures. Error bars represent standard deviations.
