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The superimpositions of the vIRF-1 DBDs. (a) The superimpositions of the four molecules of the apo-vIRF-1 DBD found in an asymmetrical unit of the crystal structure. (b) The superimposition of the DNA bound vIRF-1 (orange) and the apo vIRF-1 DBD (red). Both the DNA bound form and the apo-vIRF-1 DBD are similar, except at the L2.
