title: An alpha-helical domain in hemoglobin regulated by the proximal histidine.
mesh_terms: D002942:Circular Dichroism; D006454:Hemoglobins; D006801:Humans; D007501:Iron; D011487:Protein Conformation; D013050:Spectrometry, Fluorescence; D014461:Ultracentrifugation; D015032:Zinc
chemical_list: D006454:Hemoglobins; D007501:Iron; D015032:Zinc