Geis illustrates the hemoglobin molecule in its oxygenated state.
Used with permission from the Howard Hughes Medical Institute (www.hhmi.org). All rights reserved.
Related PDB Entry: 3A0G
Oxyhemoglobin is the form of hemoglobin that contains oxygen molecules. Hemoglobin is a protein molecule that binds to oxygen. Hemoglobin forms an unstable, reversible bond with oxygen. In its oxygen-loaded form, it is called oxyhemoglobin and is bright red.