This volume commemorates the 50th anniversary of the appearance in Volume 4 in 1948 of Dr. Jeffries Wyman's famous paper in which he laid down the foundations of linkage thermodynamics. Experts in this area contribute articles on the state-of-the-art of this important field and on new developments of the original theory. Among the topics covered in this volume are electrostatic contributions to molecular free energies in solution; site-specific analysis of mutational effects in proteins; allosteric transitions of the acetylcholine receptor; and deciphering the molecular code of hemoglobin allostery.M. Schaefer, H. van Vlijmen, and M. Karplus, Electrostatic Contributions to Molecular Free Energies in Solution. E. Di Cera, Site-Specific Analysis of Mutational Effects in Proteins. S.J. Edelstein and J.-P. Changeux, Allosteric Transitions of the Acetylcholine Receptor. G.K. Ackers, Deciphering the Molecular Code of Hemoglobin Allostery. E. Freire, Statistical Thermodynamic Linkage between Conformational and Binding Equilibria. M.T. Record, Jr., W. Zhang, and C.F. Anderson, Analysis of the Effects of Salts and Uncharged Solutes on Protein and Nucleic Acid Equilibria and Processes: A Practical Guide to Recognizing and Interpreting Polyelectrolyte Effects, Hofmeister Effects, and Osmotic Effects of Salts. S.N. Timasheff, Control of Protein Stability and Reactions by Weakly Interacting Cosolvents: The Simplicity of the Complicated. Author Index. Subject Index.Praise for the Volume The contributions are by outstanding investigators who bring both a traditional perspective on this topic and expertise and knowledge in newer aspects and applications, such as protein-nucleic acid interactions...any investigator with interests in protein folding and stability, or proló›