Energetics of ribonuclease T1 structure
1994
The energetics of thermal denaturation of two isoforms of ribonuclease Tl (Gln25 and Lys25) in various solvents have been studied by differential scanning calorimetry. It has been shown that the thermal transition of both forms of RNase T1 is strongly affected by slow kinetics, which cause an apparent deviation of the transition from a simple two-state model. By decreasing the heating rate or increasing the transition temperature, the denaturation of RNase approaches an equilibrium two-state transition. This permits determination of the thermodynamic parameters characterizing unfolding of the native structure. These thermodynamic parameters were correlated with the structural features of protein
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