title: Links of iron.
mesh_terms: D018360:Crystallography, X-Ray; D006418:Heme / Q000737:chemistry*; D006454:Hemoglobins / Q000737:chemistry* / Q000235:genetics; D006801:Humans; D007501:Iron / Q000032:analysis / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008706:Methemoglobin / Q000737:chemistry / Q000235:genetics; D020836:Protein Structure, Quaternary
chemical_list: D006454:Hemoglobins; D006418:Heme; C100003:deoxyhemoglobin; D008706:Methemoglobin; D007501:Iron