Fig. 4.
Corroboration of the main results. (a) Measured repression levels, Rloop, as a function of the distance between operators from figure 4a of Becker et al. (21). (b) Inferred free energies of looping ΔGl(l), using Eq. 1 and Rloop as in a, with Rnoloop = 5 and [N] = 15 nM. (c) Fourier analysis of the operator distance dependence of the free energy. (d) Behavior of the two main periodic components of the free energy of looping: ΔGl(l) = 9.58 – 0.72sin(2π l/11.6 – 3.08) – 0.28sin(2π l/5.2 – 3.31), where l is the distance between operators.