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Phys. Rev. Lett. 94, 178101 (2005) [4 pages]

Exons, Introns, and DNA Thermodynamics

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Enrico Carlon1, Mehdi Lejard Malki1,2, and Ralf Blossey1
1Interdisciplinary Research Institute c/o IEMN, Cité Scientifique, BP 60069, F-59652 Villeneuve d’Ascq, France
2Ecole Nationale Supérieure de Physique de Strasbourg (ENSPS), Parc d’innovation, BP 10413, F-67412 Illkirch, France

Received 5 October 2004; published 2 May 2005

See accompanying Physics Focus

The genes of eukaryotes are characterized by protein coding fragments, the exons, interrupted by introns, i.e., stretches of DNA which do not carry useful information for protein synthesis. We have analyzed the melting behavior of randomly selected human cDNA sequences obtained from genomic DNA by removing all introns. A clear correspondence is observed between exons and melting domains. This finding may provide new insights into the physical mechanisms underlying the evolution of genes.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.178101
DOI:
10.1103/PhysRevLett.94.178101
PACS:
87.15.−v, 05.70.Fh, 87.14.Gg