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Figure 3.
Figure 3. Stereoviews of the homodimeric CompA protein.
Ribbon representations are shown from "top" and "side" views,
with monomer A in green and cyan and monomer B in purple and
dark red. ADP is shown in ball-and-stick, and the [4Fe-4S]
cluster is shown as a CPK model (red and yellow spheres for iron
and sulfur, respectively). The top view is along the
non-crystallographic 2-fold symmetry axis, whereas the side view
is turned by 90° to the left, with the 2-fold lying
horizontally in the plane of the paper. The molecule was
additionally rotated a few degrees around the 2-fold axis in
this view. The bottom view is shown in CPK representation, with
the four sulfur atoms of the cluster shown in green.
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