Peptide conformations are restricted by solution stability

John S. Perkyns, B. Montgomery Pettitt

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Thermodynamic stability and statistical mechanical theory are applied to a model of a zwitterionic tripeptide of sequence Gly-Ala-Gly in high-concentration NaCl solution. It is found that many peptide conformations cannot exist in equilibrium with the salt-water solvent as a single liquid phase. This suggests a single explanation for salting proteins into and out of solution, unique biologically active protein structures, and small energy differences between denatured and folded states, while also implying a mechanism for the resolution to the Levinthal paradox.

Original languageEnglish (US)
Pages (from-to)1-2
Number of pages2
JournalJournal of Physical Chemistry®
Issue number1
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • General Engineering
  • Physical and Theoretical Chemistry


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