Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Discrete differential geometry of proteins: a new method for encoding
  three-dimensional structures of proteins   In nature the three-dimensional structure of a protein is encoded in the
corresponding gene. In this paper we describe a new method for encoding the
three-dimensional structure of a protein into a binary sequence. The feature of
the method is the correspondence between protein-folding and ``integration''. A
protein is approximated by a folded tetrahedron sequence. And the binary code
of a protein is obtained as the ``second derivative'' of the shape of the
folded tetrahedron sequence. With this method at hand, we can extract static
structural information of a protein from its gene. And we can describe the
distribution of three-dimensional structures of proteins without any subjective
hierarchical classification.

3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas