Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large-scale Oscillation of Structure-Related DNA Sequence Features in
  Human Chromosome 21   Human chromosome 21 is the only chromosome in human genome that exhibits
oscillation of (G+C)-content of cycle length of hundreds kilobases (500 kb near
the right telomere). We aim at establishing the existence of similar
periodicity in structure-related sequence features in order to relate this
(G+C)% oscillation to other biological phenomena. The following quantities are
shown to oscillate with the same 500kb periodicity in human chromosome 21:
binding energy calculated by two sets of dinucleotide-based thermodynamic
parameters, AA/TT and AAA/TTT bi-/tri-nucleotide density, 5'-TA-3' dinucleotide
density, and signal for 10/11-base periodicity of AA/TT or AAA/TTT. These
intrinsic quantities are related to structural features of the double helix of
DNA molecules, such as base-pair binding, untwisting/unwinding, stiffness, and
a putative tendency for nucleosome formation.

33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat