Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The surface accessibility of {\alpha}-bungarotoxin monitored by a novel
  paramagnetic probe   The surface accessibility of {\alpha}-bungarotoxin has been investigated by
using Gd2L7, a newly designed paramagnetic NMR probe. Signal attenuations
induced by Gd2L7 on {\alpha}-bungarotoxin C{\alpha}H peaks of 1H-13C HSQC
spectra have been analyzed and compared with the ones previously obtained in
the presence of GdDTPA-BMA. In spite of the different molecular size and shape,
for the two probes a common pathway of approach to the {\alpha}-bungarotoxin
surface can be observed with an equally enhanced access of both GdDTPA-BMA and
Gd2L7 towards the protein surface side where the binding site is located.
Molecular dynamics simulations suggest that protein backbone flexibility and
surface hydration contribute to the observed preferential approach of both
gadolinium complexes specifically to the part of the {\alpha}-bungarotoxin
surface which is involved in the interaction with its physiological target, the
nicotinic acetylcholine receptor.

17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
1
The categories of this paper are: cs