Purification of A-form DNA fibre samples by removal of B-form DNA residues

Jessica Valle Orero 1 Andrew Wildes 2 Jean-Luc Garden 3 Michel Peyrard 1
1 Phys-ENS - Laboratoire de Physique de l'ENS Lyon
2 ILL - Institut Laue-Langevin
3 CapTher - Capteurs thermométriques et calorimétrie
NEEL - Institut Néel
Abstract : To date, fibre diffraction on A-form NaDNA has always shown a B-form contamination. Here, we have used optic microscopy, calorimetry and neutron scattering techniques to define a method to obtain DNA fibres samples whose molecules are purely in the A-form. When the impure sample is heated to 320 K, the DNA molecules in the B-form undergo a transition into the A-form. Our studies have modified the accepted phase diagram for NaDNA films by including the dependence of temperature crucial for the purification of A-form samples by removal of B-form contamination.
keyword : DNA B-A transition
Type de document :
Article dans une revue
Journal of Physical Chemistry B, American Chemical Society, 2013, 117, pp.1849-1856. 〈10.1021/jp311199f〉
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https://hal-ens-lyon.archives-ouvertes.fr/ensl-00934635
Contributeur : Michel Peyrard <>
Soumis le : mercredi 22 janvier 2014 - 13:46:51
Dernière modification le : jeudi 19 avril 2018 - 14:54:03

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ENS-LYON | NEEL | UGA | UNIV-LYON1

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Jessica Valle Orero, Andrew Wildes, Jean-Luc Garden, Michel Peyrard. Purification of A-form DNA fibre samples by removal of B-form DNA residues. Journal of Physical Chemistry B, American Chemical Society, 2013, 117, pp.1849-1856. 〈10.1021/jp311199f〉. 〈ensl-00934635〉

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