Counterion effects on the structure and dynamics of solid DNA

T. Weidlich, Stuart Lindsay, A. Rupprecht

Research output: Contribution to journalArticle

42 Scopus citations


We have measured the counterion species and concentration dependence of the low-frequency Raman spectrum, speed of sound, and the A-B transition in solid DNA. We find that both the frequency of the lowest Raman active mode, and the water content at the A-B phase transition depend strongly on ion size and concentration. Longitudinal elastic constants show only a small dependence. These results indicate that ion-mediated interhelical forces control several important properties of solid DNA.

Original languageEnglish (US)
Pages (from-to)1674-1677
Number of pages4
JournalPhysical Review Letters
Issue number14
StatePublished - Jan 1 1988


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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