Keywords: Haem-a-in-cyctochrome-c-oxidase-PDB-1OCR-3D-SF-B.png Space-filling model of the haem a molecule as found in the crystal structure of bovine heart cytochrome c oxidase Histidine residues coordinating the iron atom have been omitted for clarity Colour code Carbon C grey-black Hydrogen H white Nitrogen N blue Oxygen O red Iron Fe blue-grey Structure by X-ray crystallography from http //www rcsb org/pdb/explore/explore do pdbId 1OCR PDB 1OCR http //dx doi org/10 1126/science 280 5370 1723 Science 1998 280 1723-1729 Image generated in http //accelrys com/products/discovery-studio/visualization/discovery-studio-visualizer html Accelrys DS Visualizer Own 2011-01-30 Ben Mills Benjah-bmm27 Images by Ben Mills Haem a |