Fig. 8.

Two cycles of an (N = 3)-state sequential model corresponding to Fig. 5 projected on to the (x, z) plane but neglecting state (2′). The locations of states (j) and transition states (j⁺) are displayed along with N² = 9 significant structural vectors, r_i+j⁺ − r_i, for i = 0, 1, 2, that is, (r₀⁺ − r₀), (r₁⁺ − r₀), (r₂⁺ − r₀), (r₁⁺ − r₁), etc. Recall that states [0], [3], and [6] are biochemically equivalent, as are states (1) and (4), (2) and (5), etc.