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Figure 2.
Figure 2. Structure of the closed tetramer. (a) Surface of the
complete tetramer. The viewpoint is identical to that of Figure
1(a), green, monomer A; red, monomer B; magenta, monomer C;
yellow, monomer D. It is quite evident that the V-cleft is
completely closed. (b) Stereo view of the top of the closed
dimer-dimer interface. (c) Stereo view of the amino acids at the
bottom of the Vcleft between monomers B and D. The KRK-motif of
monomer D and some interaction distances are shown under a
surface representation. (d) The structure and electron density
around Hez-A. The density is from a CNS composite omit map[36],
contoured at 1.25  ,
carve = 1.6 Å.
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