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. Author manuscript; available in PMC: 2012 Jun 14.
Published in final edited form as: Biochemistry. 2011 May 18;50(23):5301–5313. doi: 10.1021/bi200329t

Figure 6. Dimeric assemblies of CobY observed in the crystal lattice.

Figure 6

Two types of dimers are observed in the crystal lattice (A and B). In A the active sites are distal to the dimer interface, whereas in B the active sites face each other. Both types of interface are observed for four subunits in the asymmetric unit on account of pseudocrystallographic symmetry. There are thus two examples of each type interface in the crystal lattice, which suggests that the interactions are not a packing artifact. The dimers shown here correspond to the interactions between subunit B (cyan) and D (gray). GTP is depicted in a space-filling representation.