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. Author manuscript; available in PMC: 2011 Mar 14.
Published in final edited form as: Structure. 2010 Mar 14;18(4):458–470. doi: 10.1016/j.str.2010.01.014

FIG. 1.

FIG. 1

The Lymn-Taylor cycle. Figure (A) shows the functional details of the cycle; Figure (B) shows the position of the switches for each state. (I) Rigor state - both switch I and switch II are open; no ligand. (II) Post-rigor state - switch I closed, switch II open; ATP. (III) Post-recovery state - switch I closed, switch II closed; ATP. (IV) Pre-powerstroke state - both switches are closed; ADP.Pi. The post-recovery state is assumed to have the same lever arm position as in pre-powerstroke, but ATP has not been hydrolyzed yet; it is in equilibrium with the post-rigor state (no structure is available but see Ref. [45]).