Dependence of landscape parameters on protein size. (A) Position of unfolded state, barrier and folded state on Q, Qu (black), Q‡ (red) and Qf (blue) respectively. (B) Free energy barriers for folding, ∆Gf (black) and unfolding ∆Gu (red). (C) Curvatures of unfolded well ωu (black), barrier top ω‡ (red) and folded well ωf (blue). (D) Average diffusion coefficient on Q. Lines shown are fits of Qf, Q‡, ωu, ω‡, ωf to constants, a linear fit of Qu and a power law fit of Db.