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Figure 2.
Electron density maps around the heme at DosS GAF-A. A, water
molecule interacts with the heme iron at the distal position in
the native structure. B, ferrous iron is five coordinated in the
reduced form of GAF-A. C, upon air exposure, a water molecule
ligands the heme iron at the distal position. D, cyanide
interacts with the heme at the distal position, and Tyr-171
guides the cyanide interaction. The 2F[o]-F[c] electron density
maps were contoured at the 1.5 σ level.
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