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Growth curves of the S. oneidensis WT (filled symbols) and DL13 (open symbols) on various sources of sulfur. Triangles, cysteine; diamonds, K2SO4; circles, homocysteine; squares, methionine. The data from 0 to 7 h are not shown, because under these conditions, there was long lag phase and little growth was seen. At time zero, the OD600 was 0.03. Data are representative of experiments done in triplicate.
