SciELO - Scientific Electronic Library Online

 
vol.28 issue1Study of diesel - biodiesel blends by visible light refractometry: Application to the argentine commercial blendStudy of wettability and charactrization of the PDMS - glass system in microfluidic devices author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

  • Have no cited articlesCited by SciELO

Related links

  • Have no similar articlesSimilars in SciELO

Share


Anales (Asociación Física Argentina)

Print version ISSN 0327-358XOn-line version ISSN 1850-1168

Abstract

BERTOLOTTO, J. A et al. Study of electric linear dichroism of sonicated and fractioned DNA through gel chromatography. An. AFA [online]. 2017, vol.28, n.1, pp.4-9. ISSN 0327-358X.

This work studies the dependence of reduced electric linear dichroism (RELD) of DNA samples as a function to the applied electric field. To do so, a DNA solution is subjected to sonication, which results in a sample whose molecular size range varies, approximately, between 100 and 1000 base pairs. In order to obtain more monodisperse fractions, the sample is fractionated using the gel chromatography method, obtaining various DNA fractions which are useful for the analysis by means of electrooptical techniques. These fractions are characterized using gel electrophoresis, so as to obtain the distribution of chain lengths and their average for each fraction. The RELD experimental results are fitted by means of a theoretical model of flexible curved rod with electric polarizability which saturates with the applied electric field, where it is taken into account not only the longitudinal electrical polarizability but also the transversal one. The results of this study are similar to the ones obtained by other authors using DNA fragmentation by restriction enzymes. The advantage of the fractionation technique used resides in the obtention of samples of larger volume to apply electrooptical techniques.

Keywords : DNA; Electric linear dichroism.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License