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Interactions of the terminal phenyl ring in the N-arylpiperazine scaffold. Fluoro-substituted edges of the terminal phenyl ring in compounds 12 (A) and 11 (B) face residues I45, F48, F55, and I70. Inhibitors are shown in van der Waals spheres highlighted in yellow. van der Waals radii of the amino acid residues (blue sticks) are marked by blue dots. Heme is in stick mode. Heteroatoms are colored by type: oxygen in red, nitrogen in blue, fluorine in cyan, iron in ochre.
