Conformation of Circular DNA in Two Dimensions

The conformation of circular DNA molecules of various lengths adsorbed in a 2D conformation on a mica surface is studied. The results confirm the conjecture that the critical exponent ν is topologically invariant and equal to the self-avoiding walk value (in the present case ν=3/4), and that the topology and dimensionality of the system strongly influence the crossover between the rigid regime and the self-avoiding regime at a scale L≈7ℓp. Additionally, the bond correlation function scales with the molecular length L as predicted. For molecular lengths L≤5ℓp, circular DNA behaves like a stiff molecule with an approximately elliptic shape.


Published in:
Physical Review Letters, 101, 14, 148103
Year:
2008
Publisher:
American Physical Society
ISSN:
1079-7114
Keywords:
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2009-09-07, last modified 2018-03-17

n/a:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)