Overlay of the X-ray structure with ATP configurations taken from the top three most structurally similar MSM states: a, state 58 (19th most populated), b, state 148 (10th most populated) and c, state 73 (1st most populated). In each panel, the ATP coloring scheme for the X-ray structure is as in Fig. 1, and each structure from the MSM is solid green. The RMSD value between the experimentally determined ATP molecule and the representative MSM configuration is shown in the corresponding panel.