Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electrostatically assisted macroion association   A model system of highly asymmetric polyelectrolyte with directional
short-range attractive interactions was studied by canonical Monte Carlo
computer simulations. Comparison of MC data with previously published
theoretical results shows good agreement. For moderate values of binding
energies, which matches those of molecular docking, a dynamic equilibrium
between free and dimerized macroions is observed. Fraction of dimerized
macroions depends on macroion concentration, binding energy magnitude, and on
the valency of small counterions. Divalent counterions induce an effective
attraction between macroions and enhance dimerization. This effect is most
notable at low to moderate macroion concentrations.

19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th