(bÄ«l), Avoid the jargonistic substitution of this word for bile pigment(s) in expressions such as bile in the urine and bile staining of tissues.
Hemoglobin (Haemoglobin in many varieties of English) is a tetramer consisting of two dimers that binds to oxygen. Hemoglobin is the oxygen binding protein of red blood cells and is a globular protein with quaternary structure.Hemoglobin consists of four polypeptide subunits; 2 alpha chains and two beta chains. Hemoglobin transports oxygen in the blood from the lungs to the rest of the body.The three-dimensional structure of hemoglobin was solved using X-ray crystallography in 1959 by Max Perutz.emoglobin consists of four polypeptide subunits; 2 alpha chains and two beta chains. Hemoglobin transports oxygen in the blood from the lungs to the rest of the body. The three-dimensional structure of hemoglobin was solved using X-ray crystallography in 1959 by Max Perutz.
For instance, the blood protein hemogobin is made up of four polypeptide chains, each of which also contains a heme molecule, which is ring structure with an iron atom in its center. Proteins have different shapes and molecular weights, depending on the amino acid sequence. For example, hemoglobin is a globular protein, which means it folds into a compact globe-like structure, but collagen, found in our skin, is a fibrous protein, which means it folds into a long extended fiber-like chain.