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Growth of EcKatG-induced cells compared with uninduced cells of Methanosarcina acetivorans strain DJL20 in medium supplemented with haemin. Cultures of DJL20 were grown in the absence (triangles) or presence (squares) of tetracycline in medium lacking (open symbols) or containing (filled symbols) 30 µM haemin. The data plotted are the mean±sd from three independent experiments.
