For 10 points, name this protein found in red blood cells that is used to transfer oxygen in the body.
This protein is salvaged from special cells that carry it by transferrins and is often processed by the body into bilirubin. Another structurally similar relative, found in muscle tissue, to this protein is known as myoglobin. Found in biconcave disk shaped cells without a nucleus, the substitution of valine for glutamic acid in the production of this protein causes sickle cell anemia. This protein is a metalloprotein, with an iron cofactor. For 10 points, name this protein found in red blood cells that is used to transfer oxygen in the body.
This protein is salvaged from special cells that carry it by transferrins and is often processed by the body into bilirubin.
{hemoglobin}