Oxymyoglobin Focusing on the components of the oxygen binding site
	Skeletal model of myoglobin Spacefilling representation of the heme group Zoom in on heme group (Note how the volumes for the nitrogens on the heme overlap with that for the iron.) Add spacefilling representation for the bound oxygen Show proximal histidine Change proximal histidine to spacefilling model (Note how the volume for the nitrogen on the proximal histidine overlaps with that for the iron.) Show distal histidine Change distal histidine to spacefilling model (Note that the volume for the distal histidine touches, but does not overlap with the volumes of either the bound oxygen molecule or the heme.)