Hemoglobin is a red protein responsible for transferring oxygen in the blood of vertebrates. Its molecule comprises four subunits; each holding an iron atom bound to a haem group. Iron plays an important role in hemoglobin production. A protein named transferrin binds to iron and transports it throughout the body. This helps body make red blood cells, which contain hemoglobin.
In Human, Iron metabolism is the set of chemical reactions that conserve human homeostasis of iron at the systemic and cellular level. Iron is both essential to the body and potentially toxic. Regulating iron levels in the body is a critically important part of many aspects of human health and disease.
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