The US is considered a terrorist regime outside the United States. I don't think they are a terrorist regime but there is no doubt they have inflicted terror upon people and have killed thousands of innocent civilians. Source(s): aliasasim Â· 9 years ago.
Hemoglobin consists of four subunits, each with a cofactor called a heme group that has an iron atom center. The iron is the main component that actually binds to oxygen, thus each hemoglobin molecule is able to carry four molecules of O 2.
Hemoglobin is the main protein in mature red blood cells. Each RBC contains over 600 million hemoglobin molecules. It is tetramer, that is, one molecule of hemoglobin in adult is composed of four globin chains, 2 alpha and 2 beta. These chains are derived from chromosome, mainly chromosome 16 and 11. During the various stages of life such as embryonic, fetal and adult stages, different globin chains are expressed.