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Figure 3.
FIGURE 3. Structure in the heme pocket of Cj-trHbP. A, a
stereo view of the heme, of the proximal His(F8), and of the
surrounding distal residues contacting the heme and stabilizing
the bound cyanide. Hydrogen bonds within the distal residue
cluster, including the heme ligand, are indicated with dashed
lines. Residue His^46(E7) is shown in the closed and open
(magenta) conformations. B, details of the heme distal site,
including the C helix (top in the figure) and the E helix; for
comparison, the C-E backbone region of group I C. eugametos
trHbN (orange) is also displayed.
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