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Figure 4.
FIGURE 4. Dimer structure in the two PhTET1 complexes. A,
ribbon representation of a dimer extracted from the tetracosamer
quasi-atomic model (blue) superimposed to a dimer from the
dodecamer x-ray structure (red). Cobalt ions are shown as
spheres. The bottom monomers of each dimer were forced to match,
hence the stereo picture illustrates the rotation of 14° of
the upper PhTET1-24s monomer with respect to the center of mass
of the PhTET1-12s dimer. A and Fig. 2A are related by a 90°
rotation around the vertical axis. B, cut open surface
representations of the PhTET1 edifices showing the position of
one dimer in the tetrahedral complex (top) and in the octahedral
assembly (bottom). The dimers are depicted and oriented as in A.
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