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Figure 4.
Figure 4. Hydrogen bonding in the mobile loops. a, Stereo
view of the distal pocket in NP4 -NO. b, Stereo view of the
N-terminus in NP4 -NO. c, Stereo view of the closed (red lines)
and open (green lines) conformers of NP4, after superimposing
them. In (a) and (b), bonds are open for Asp 30 and filled for
the other residues. Nitrogens are indicated by large open
spheres, carbons by small open spheres, oxygens by shaded
spheres, and hydrogen bonds by dashed lines.
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