hemoglobin (human, hb) protein molecule. iron-containing oxygen transport protein found in red blood cells. heme shown as

acid amino anemia atoms bilirubin blood carbon cells co co2 complex deoxyhemoglobin dioxide disease globin globular haemoglobin hb health hematocrit heme hemoglobin human hypoxia iron model molecular molecule monoxide nitric no oxide oxygen pdb4hhb peptide polymer polypeptide porphyria protein red science scientific structure transport