## Abstract Using the formalism of nearestโneighbor Ising model and assuming that the allowed states for a monomeric unity of a polypeptide chain in solutions containing strong acids are E (helix), C (coil), and CS (solventโbonded coil), the partition function of the system was deduced analytically
Application of modified ising model to the helix-coil transition of DNA molecules
โ Scribed by M. Leung; F. C. Choo; B. Y. Tong
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1977
- Tongue
- English
- Weight
- 561 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0006-3525
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โฆ Synopsis
Abstract
Equilibrium properties of heterogeneous DNA near the melting temperature T~m~ are investigated using the grand partition function. The present approach gives exact and analytical solutions. The algebraic expressions enhance a more thorough understanding of the correlation among many observed equilibrium phenomena. The following quantities have been examined: melting temperature T~m~, transition width W, partial melting curves ฮธ~AT~ and ฮธ~GC~, mean length of a helical segment h, and correlation length ฮณ.
๐ SIMILAR VOLUMES
Multiple, independent sites or domains behave, on chemical change, in a manner predicted by Langmuir. Distortions of this behavior have been attributed to interactions between the domains, which vary with the progress of the changes occurring at the sites or domains. The two main models for nearest
## Abstract The effect of magnesium ions on the parameters of the DNA helixโcoil transition has been studied for the concentration range 10^โ6^โ10^โ1^__M__ at the ionic strengths of 10^โ3^__M__ Na^+^. Special attention has been given to the region of low ion concentrations and to the effect of poly
A general theory of polyelectrolyte solutions is here used to calculate the differences in Gibbs free energy, enthalpy, and entropy between the coil and helix forms of DNA a t any temperature and salt concentration. The salt has univalent cations and is assumed present in excess over the base concen
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 predi