Figure : Steady state kinetics of Motor S at 300K. A: dependence of the steady state probabilities on the total photoisomerization rate. B: dependence of steady state rotation rate of the motor on the total photoisomerization rate, where the three curves correspond to three different distributions of metastable substates generated by photoisomerization: the distribution that leads to the fastest rotation (MS1:MS2:MS3:MS4=1:0:0:0), the distribution that leads to the slowest rotation (MS1:MS2:MS3:MS4=0:1:0:0), and the distribution inferred from our surface-hopping MD trajectories (MS1:MS2:MS3:MS4=7:2:4:0). In A, the distribution from MD is used.