Fig. 2.
Competition between nitrate reductase mutants. Top, E. coli MG1655 ΔnapDA versus E. coli MG1655 ΔnarG; middle, E. coli MG1655 ΔnarZ versus E. coli MG1655 ΔnarG; bottom, E. coli EDL933 ΔnarZ versus E. coli EDL933 ΔnarG.
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