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Hemoglobin is the protein particle in red platelets that conveys oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs. Hemoglobin is additionally found outside red platelets and their begetter lines. Different cells that contain hemoglobin incorporate the A9 dopaminergic neurons in the substantia nigra, macrophages, alveolar cells, and mesangial cells in the kidney. In these tissues, hemoglobin has a non-oxygen-conveying capacity as a cell reinforcement and a controller of iron digestion system.
Hemoglobin is made up of four protein molecules (globulin chains) that are connected together. The normal adult hemoglobin (Hbg) molecule contains two alpha-globulin chains and two beta-globulin chains. In fetuses and infants, beta chains are not common and the hemoglobin molecule is made up of two alpha chains and two gamma chains.
Related Journals of Haemoglobin