Figure 3
Close-up of the domain-exchange `hinge loop' of the dimer (chain G, red; chain H, blue) viewed approximately along the local twofold axis, with the superimposed IBD domain from the human integrase complex (PDB entry 2b4j) shown in yellow. Residue and helix labels without chain identifiers correspond to PDB entry 2b4j. The side chain of Phe406 in the 2b4j monomer is replaced by Val408G of the opposing subunit in the dimer. |