Table 1 The activation energies (E_a) for the transition processes from the L- to M-intermediate (L → M), from the M- to O-intermediate (M → O), and from the O-intermediate to original state (O → original) of RxR and those of BR. The E_a values for BR were subtracted from those for RxR to obtain ΔE_a. The percentages of ΔE_a to E_a for RxR were shown in brackets.

From: Vectorial Proton Transport Mechanism of RxR, a Phylogenetically Distinct and Thermally Stable Microbial Rhodopsin