Figure 5.
Structure of the heme domain of GLB-6. Ribbon structure of the GLB-6 heme domain (molecule A) is shown with helices labeled according to the canonical globin fold. His254 and His289, distal (above) and proximal (below) heme ligands, respectively, and the heme moiety are shown as stick representation. Praseodymium atoms are represented as orange spheres. Note that residues 318–321 could not be traced and are shown as black dots. Lower panel shows 2Fo-Fc composite simulated-annealing omit electron density map (1.0σ, gray mesh) calculated with heme moieties omitted.