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On the Application of Polyelectrolyte “Limiting Laws” to the Helix-Coil Transition of DNA. II. The Effect of Mg++ Counterions (1972)

Manning, Gerald S.

New York : Wiley-Blackwell

Biopolymers 11 (1972), S. 951-955

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ISSN: 0006-3525

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The techniques of the previous article are here applied to the case for which the solution contains, in addition to excess uni-univalent salt, one equivalent of divalent counterions per mole nucleotide. In agreement with the melting temperature measurements of Dove and Davidson for Mg++, it is predicted that a region of uni-univalent salt concentration then exists in which (dT m/d log m A+) is negative. It is further predicted, in accord with experiment, that in the presence of divalent counterions, the helical form of DNA is much more stable than in their absence.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/bip.1972.360110503

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