Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ashkin-Teller formalism for elastic response of DNA molecule to external
  force and torque   We propose an Ashkin-Teller like model for elastic response of DNA molecule
to external force and torque. The base-stacking interaction is described in a
simple and uniform way. We obtain the phase diagram of dsDNA, and in
particular, the transition from B form to the S state induced by stretching and
twisting. The elastic response of the ssDNA is presented also in a unified
formalism. The close relation of dsDNA molecule structure with elastic response
is shown clearly. The calculated folding angle of the dsDNA molecule is
$59.2^o$.

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The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom