Chart 1. Third-Order Rate Constants, k_act, for Activation of HAdK1- and OMPDC-Catalyzed Reactions of Truncated Substratesa.

^a The activator is shown on the left and the substrate on the right. The values of ΔΔG^† give the effect of the change in activator or substrate on ΔG^† for the optimal reactions of EA or EO.