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Indian J Biochem Biophys ; 1992 Dec; 29(6): 449-57
Artículo en Inglés | IMSEAR | ID: sea-28658

RESUMEN

The Zimm and Bragg theory of the helix<-->coil transition has been modified to explain order<-->order transitions in polynucleotides, in particular B<-->Z<-->psi(-)<-->coil transitions in poly(dG-dC) and poly(dG-me5dC). Lambda anomalies in specific heat measurements around the transition point have also been explained by a further modification of the same theory. Theoretical results are found to be in good agreement with the experimental data. The nucleation parameter is consistent with the stabilization/destabilization of the ordered states (Z helix) under various environmental conditions, e.g. methylation of cytosine residue at C5 position or change in the cationic concentration of the solvent.


Asunto(s)
Calorimetría , Calor , Cinética , Matemática , Conformación de Ácido Nucleico , Polidesoxirribonucleótidos/química , Termodinámica
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