Direct observation of large temperature fluctuations during DNA thermal denaturation

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dc.creatorNagapriya, K. S.
dc.creatorRaychaudhuri, A. K.
dc.creatorChatterji, Dipankar
dc.date2005-01-06
dc.date2006-02-10
dc.date.accessioned2026-07-07T06:37:26Z
dc.date.available2026-07-07T06:37:26Z
dc.descriptionIn this paper we report direct measurement of large low frequency temperature fluctuations in double stranded (ds) DNA when it undergoes thermal denaturation transition. The fluctuation, which occurs only in the temperature range where the denaturation occurs, is several orders more than the expected equilibrium fluctuation. It is absent in single stranded (ss) DNA of the same sequence. The fluctuation at a given temperature also depends on the wait time and vanishes in a scale of few hours. It is suggested that the large fluctuation occurs due to coexisting denaturated and closed base pairs that are in dynamic equilibrium due to transition through a potential barrier in the scale of 25-30k_{B}T_{0}(T_{0}=300K).
dc.description4 pages, 5 figures, Replaced with revised version
dc.identifierhttps://arxiv.org/abs/cond-mat/0501116
dc.identifierhttp://arxiv.org/abs/cond-mat/0501116
dc.identifierPRL 96, 038102 (2006)
dc.identifierdoi:10.1103/PhysRevLett.96.038102
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100391
dc.subjectStatistical Mechanics
dc.subjectSoft Condensed Matter
dc.subjectBiological Physics
dc.titleDirect observation of large temperature fluctuations during DNA thermal denaturation
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