Protein ionizable groups: pK values and their contribution to protein stability and solubility.

@article{Pace2009ProteinIG,
  title={Protein ionizable groups: pK values and their contribution to protein stability and solubility.},
  author={Cynthia Pace and Gerald R. Grimsley and J. Martin Scholtz},
  journal={The Journal of biological chemistry},
  year={2009},
  volume={284 20},
  pages={
          13285-9
        }
}
The structure, stability, solubility, and function of proteins depend on their net charge and on the ionization state of the individual residues. Consequently, biochemists are interested in the pK values of the ionizable groups in proteins and how these pK values depend on their environment. We review what has been learned about pK values of ionizable groups in proteins from experimental studies and discuss the important contributions they make to protein stability and solubility. 

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