Extended Data Fig. 5: Environment of the accessory heme group in CcmF.
From: Architecture of the membrane-bound cytochrome c heme lyase CcmF
The stereo figure shows the b-type heme group liganded by residues H259 in helix h7 and H493 in helix h14. The open space above the accessory heme is the vestibule suggested to accommodate the substrate heme group for attachment to an apocytochrome chain. The refined 2Fo–Fc electron density map is contoured at the 1 σ level.
