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Plot of the exponential growth rate α of fermenting WT (red triangles) and vma2ΔW(blue circles) versus the concentation of FeIIIcitrate added to the growth medium. Points are the averages of 2-3 independent batches; bars represent standard error. The solid red line is a simulation using Equation 1 and αcyt = 0.185 h−1, αvac = 0.176 h−1, and Kα = 15 mM. The solid blue line is the same except αvac = 0.
