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CYP1A1 (light blue ribbons and sticks) active site with GDC-0339 (cyan sticks) bound. Heteroatoms are as indicated: nitrogen, royal blue; oxygen, red; sulfur, yellow; fluorine, light blue; iron, rust. Electron density is shown as 2Fo – Fc composite omit map contoured at 1.0 σ (gray mesh) for ligand and heme. Distances from the heme iron to the closest GDC-0339 atoms are shown by red dashed lines and labeled with the respective distances.
