Can re-entrance be observed in force induced transitions?

Details Can re-entrance be observed in force induced transitions? Can re-entrance be observed in force induced transitions?

2008-05-25

arxiv.org/abs/0805.3837v2

Physics

Condensed Matter

Soft Condensed Matter

12 pages and 5 figures (RevTex4). Accepted in Europhys Lett. (2009)

Scientific paper

10.1209/0295-5075/85/38003

A large conformational change in the reaction co-ordinate and the role of the solvent in the formation of base-pairing are combined to settle a long standing issue {\it i.e.} prediction of re-entrance in the force induced transition of DNA. A direct way to observe the re-entrance, i.e a strand goes to the closed state from the open state and again to the open state with temperature, appears difficult to be achieved in the laboratory. An experimental protocol (in direct way) in the constant force ensemble is being proposed for the first time that will enable the observation of the re-entrance behavior in the force-temperature plane. Our exact results for small oligonucleotide that forms a hairpin structure provide the evidence that re-entrance can be observed.

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