Manipulating a single adsorbed DNA for a critical endpointRajeev Kapri1 and Somendra M. Bhattacharjee2
1 Department of Theoretical Physics, Tata Institute of Fundamental Research - Mumbai 400 005 India
2 Institute of Physics - Bhubaneswar 751 005 India
received 22 April 2008; accepted in final form 4 August 2008; published September 2008
published online 15 September 2008
We show the existence of a critical endpoint in the phase diagram of unzipping of an adsorbed double-stranded (ds) polymer like DNA. The competition of base pairing, adsorption and stretching by an external force leads to the critical end point. From exact results, the location of the critical end point is determined and its classical nature established.
82.37.Rs - Single molecule manipulation of proteins and other biological molecules.
68.35.Rh - Phase transitions and critical phenomena.
05.70.Jk - Critical point phenomena.
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