title: [Orientation and stretching of DNA chains during pulsed field gel electrophoresis].
abstract: The quantitative analysis of the decay of birefringence accompanying gel electrophoresis leads to the characterization of two phenomena respectively attributed to alignment of the tube and to overstretching of the chain in its tube. The major contribution to the molecular orientation is given by the overstretching which relaxes according to a stretched exponential law. The other process, slow, is characterized by a reptation time and a mean orientation factor in good agreement with the biased reptation model without overstretching.
authors.affiliation: Institut Charles-Sadron, C.R.M.-C.N.R.S., Strasbourg.
authors.forename: P
authors.initials: P
authors.lastname: Mayer
authors.forename: J
authors.initials: J
authors.lastname: Sturm
authors.forename: G
authors.initials: G
authors.lastname: Weill
mesh_terms: D004247:DNA / Q000302:isolation & purification*; D004587:Electrophoresis, Agar Gel / Q000379:methods*; D008433:Mathematics
chemical_list: D004247:DNA
vernacular_title: Orientation et déformation des chaînes d'ADN pendant l'électrophorèse sur gel en champ pulsé.