Protein DenaturationHot TemperatureGuanidineUreaThermodynamicsSolventsTemperatureNucleic Acid DenaturationGuanidinesHeat-Shock ProteinsCircular DichroismProtein FoldingProtein ConformationSpectrometry, FluorescenceWaterHydrogen-Ion ConcentrationProteinsProtein Structure, SecondaryKineticsHSP70 Heat-Shock ProteinsModels, MolecularCalorimetry, Differential ScanningEnzyme StabilityProtein RenaturationSpectrophotometry, UltravioletAnilino NaphthalenesulfonatesCalorimetryDrug StabilityFormamidesNucleic Acid RenaturationProtein UnfoldingProtein StabilityEscherichia coli