Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enol form of uracil in the GU "wobble" pair. NMR evidence   GU "wobble" pair may contain either the enol form of uracil and the keto form
of guanine or the enol form of guanine and the keto form of uracil. A direct
proof of uracil existence in enol form can be obtained by using NMR
spectroscopy. In HNN-COSY experiments the GU pair imitates the GC pair due to
the enolization of uracil.

34
The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
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The categories of this paper are: stat
12
The categories of this paper are: nucl-th
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The categories of this paper are: eess
1
The categories of this paper are: cs
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph