Deoksihemoglobiinin

Deoxyhemoglobin is a form of hemoglobin, the oxygen-carrying protein found in red blood cells, that does not bind to oxygen. Hemoglobin consists of four subunits, each containing a heme group that can bind to one oxygen molecule. In deoxyhemoglobin, the iron atom within the heme group is in the ferrous (Fe2+) state and is not coordinated to an oxygen molecule. This form of hemoglobin is present in the blood when oxygen levels are low, such as during exercise or at high altitudes. The release of oxygen from hemoglobin is facilitated by the binding of carbon dioxide and hydrogen ions, which causes a conformational change in the hemoglobin molecule. Deoxyhemoglobin is also involved in the transport of carbon dioxide and hydrogen ions from the tissues to the lungs. The structure and function of deoxyhemoglobin are crucial for understanding the physiology of oxygen transport and regulation in the body.