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The growth profiles of B. subtilis, the parental strain (open squares), ggt mutant (open diamonds), ywrD mutant (filled circles), and double mutant (filled triangles) in minimal medium with sulfate (A) or GSH (B) as a sulfur source. The growth was monitored by measuring the optical density at 600 nm (OD600). The experiments were repeated three times with essentially the same results, and the data for a representative experiment is shown.
