Image removed due to copyright considerations. See Figures 2 and 3 in Barkai, N, S Leibler Robustness in simple biochemical networks. Nature 387, no. 6636(Jun 26, 1997): 913-7Image removed due to copyright considerations. See Figures 2 and 3 in Barkai, N., S. Leibler. "Robustness in simple biochemical networks." Nature 387, no. 6636 (Jun 26, 1997): 913-7