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Hemoglobin


 

Hemoglobin or haemoglobin (frequently abbreviated as Hb, {{PDB|1A3N}}) is the iron-containing oxygen-transport metalloprotein in the red cells of the blood in mammals and other animals. The molecule consists of globin, the apoprotein, and four heme (or haem) groups, which are organic molecules with an iron atom in each.

See also