Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Monte Carlo implementation of supercoiled double-stranded DNA   Metropolis Monte Carlo simulation is used to investigate the elasticity of
torsionally stressed double-stranded DNA, in which twist and supercoiling are
incorporated as a natural result of base-stacking interaction and backbone
bending constrained by hydrogen bonds formed between DNA complementary
nucleotide bases. Three evident regimes are found in extension versus torsion
and/or force versus extension plots: a low-force regime in which over- and
underwound molecules behave similarly under stretching; an intermediate-force
regime in which chirality appears for negatively and positively supercoiled DNA
and extension of underwound molecule is insensitive to the supercoiling degree
of the polymer; and a large-force regime in which plectonemic DNA is fully
converted to extended DNA and supercoiled DNA behaves quite like a torsionless
molecule. The striking coincidence between theoretic calculations and recent
experimental measurement of torsionally stretched DNA [Strick et al., Science
{\bf 271}, 1835 (1996), Biophys. J. {\bf 74}, 2016 (1998)] strongly suggests
that the interplay between base-stacking interaction and permanent
hydrogen-bond constraint takes an important role in understanding the novel
properties of elasticity of supercoiled DNA polymer.

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The categories of this paper are: astro-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
1
The categories of this paper are: cs
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The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph