SEARCH Articles Figures Tables Activation free energy intrinsic barrier Chiral free energy barriers Confinement, Entropic Barrier, and Free Energy Landscape Energy barriers Folding free energy barrier Free energy barrier Free energy barrier Free energy barrier polarization effect Free energy barrier scaling Free energy conformation rotational barriers Free-energy barrier for escape of water molecules from protein hydration layer Gibbs free energy barrier Internal free-energy barrier Intrinsic free energy barriers Reaction free energy barrier Thermodynamic free-energy barrier