Description_x000D_ General description_x000D_ Hemoglobin is the major component of red blood cells, and is responsible for their red color. Its normal concentration in erythrocytes is 34%. Hemoglobin is the most important respiratory protein of vertebrates by virtue of its ability to transport oxygen from the lungs to body tissues, and to facilitate the return transport of carbon dioxide._x000D_ Application_x000D_ Hemoglobin was used to study the influence of net protein charge and stationary phase charge on protein retention in size exclusion chromatography.It was also used in a comparative study on STM imaging and electrocatalytic activity of different surfaces modified with flavin adenine dinucleotide._x000D_ Packaging_x000D_ 10 g in poly bottle_x000D_ Biochem/physiol Actions_x000D_ The Fe2+/Fe3+ balance is a physiological indicator of blood oxygenation. Deoxygenated hemoglobin accessorizes a feedback loop by reducing nitrite to NO, a vasodilator which enhances blood flow to oxygen-deprived tissues._x000D_ Oxygen transporter, NO scavenger_x000D_ Caution_x000D_ Since native hemoglobin is readily oxidized in air, these preparations may be predominantly methemoglobin.