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Misconceptions arising from a Sign Discrepancy in Thermodynamic Data for the Gibbs Free Energy Profile of Ribonuclease A

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Abstract:

An apparent discrepancy in the data for the Gibbs free energy change as a function of temperature at different pHs, originally published by Brandts in 1965 and repeated by Brandts and Hunt in 1967 with an unexplained change in sign, has lead to close to 40 years of misguided thinking in examining the thermodynamics of protein unfolding, including the frequently promulgated idea of cold denaturation. We have carried out a detailed analysis based on the Planck-Benzinger approach, which is very powerful in clarifying the fundamental aspects of biochemical energetics.

Keywords: Gibbs Free Energy; Misconceptions; Ribonuclease A; Thermodynamic

Document Type: Review Article

DOI: https://doi.org/10.2174/0929866023408625

Publication date: 2002-08-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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