Molecular surface on a BAT dimer. A, overall view of the molecular surface. Positive and negative charges are shown in blue and red, respectively, and arrows indicate the directions of view for B and C. B, Bm-binding pocket comprised of a canyon-like groove formed by the interface of two C-terminal domains of BAT and funnel-like entrance of the tunnel formed in the N-terminal domain of BAT. The former and latter accommodate the DNA-binding and metal-binding domains of Bm, respectively. C, narrow entrance of the tunnel formed in the N-terminal domain, where the CoA molecule is inserted. D, side view of the tunnel in the N-terminal domain. The molecular slab including the tunnel is shown. The transparency of the surface is set to 70%.