Top right: dial plots of the development of proline kink angles during a simulation. The simulation time proceeds radially from the center of each dial.
Left and bottom right: definition of the angles(I. Visiers, B.B. Braunheim, and H. Weinstein, Prokink: a protocol for numerical evaluation of helix distortions by proline. Prot. Engrg., 13, 603-606 (2000). DOI: 10.1093/protein/13.9.603).