Beta globin
Beta globin
Beta globin (pronounced: /ˈbeɪtə ˈɡloʊbɪn/) is a type of globin protein, which is a component of hemoglobin, the molecule that carries oxygen in the blood.
Etymology
The term "beta" is derived from the second letter of the Greek alphabet, indicating its position in the sequence of globin chains. "Globin" comes from "globus," Latin for sphere, referring to the protein's round shape.
Function
Beta globin is one of the two types of globin chains in adult hemoglobin, the other being alpha globin. Each molecule of hemoglobin contains two alpha and two beta globin chains. The function of beta globin is to bind with oxygen for transport in the blood.
Related terms
- Alpha globin: The other type of globin chain in adult hemoglobin.
- Hemoglobin: The molecule that carries oxygen in the blood, composed of alpha and beta globin chains.
- Globin: A family of proteins, which includes alpha and beta globin, that have a characteristic globular structure.
Disorders
Mutations in the beta globin gene can lead to disorders such as beta thalassemia and sickle cell anemia. In beta thalassemia, the body produces less beta globin, leading to a shortage of hemoglobin. In sickle cell anemia, the beta globin protein is abnormal, causing the red blood cells to become rigid and sickle-shaped.
External links
- Medical encyclopedia article on Beta globin
- Wikipedia's article - Beta globin
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