List of ΔVavg, σΔV and k0P values obtained by GaMD simulations of alanine dipeptide. (A) The results were collected from conventional GaMD simulations with a fixed threshold energy and σ0P value. (B) The results were collected from force constant rex-GaMD simulations with the exchange of σ0P within 1.0 to 1.6 kcal/mol. Three independent simulations were performed. The ΔVavg and σΔV values were calculated at the stage of σ0P=1.0 kcal/mol. (C) The results were collected from threshold energy rex-GaMD simulations. The threshold energy was switched between lower and upper bound. The ΔVavg and σΔV values were collected when threshold energy was at the lower bound.