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. Author manuscript; available in PMC: 2008 Nov 2.
Published in final edited form as: J Mol Biol. 2007 Aug 23;373(4):1006–1016. doi: 10.1016/j.jmb.2007.08.040

Figure 3.

Figure 3

Model of protoporphyrin IX in the active site and composite omit map of monomer A for the E343K data highlighting residues within van der Waals contact of the substrate. (a) View of the porphyrin macrocycle and nearby residues on the H263 side of the pocket. (b) View of the porphyrin in the active site looking at the substrate from the same side of the substrate as residue M76. The atoms are represented as sticks and are colored blue, red, yellow and tan for nitrogen, oxygen, sulfur and carbon, respectively. For clarity the 2Fo-Fc omit map is contoured at 1σ around the substrate only and was generated as described in the legend to Figure 2.