A histogram plot of the selected dihedral order parameter computed from the trajectory (as shown in Figure ). Labels A1 and A2 correspond to the two different, but symmetry-equivalent populations of the more favorable binding mode; B1 and B2 to the symmetry-equivalent populations of the less favorable binding mode. The legend shows computed populations; with enough simulation time the symmetric binding modes should have equivalent populations, which is not the case after over 800 ns of simulation, partly because out-of-plane flips between symmetry equivalent modes are so rarely observed. Thus, A2 and B2 end up underpopulated relative to their symmetry equivalent partners A1 and B1.