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Figure 3.
Fig. 3. Interaction of the D^290ECH and the T322AT
sequence of HCV RNA helicase. Note Asp290, Glu291, and His293
that form a part of the active site cavity are on a loop
structure and point in the same direction. The backbones of the
DECH motif and TAT sequence are in cyan and magenta,
respectively, and the side chains are in green. The white dotted
line indicates the hydrogen bond between His293 and Thr322.
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