Alpha error
Alpha error: The statistical error made in testing a hypothesis when it is concluded that a result is positive, but it really is not. Also known as false positive.
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- Alpha helix
Alpha helix: The coiled structure of many proteins consisting of a single chain of amino acids stabilized by hydrogen bonds. The alpha helix was first proposed by Linus Pauling and Robert Corey in a brilliant series of paper in the early 1950s. It is also known as the Pauling-Corey helix. See also: Pauling, Linus.
- Alpha interferon
Alpha interferon: A protein produced by the body in response to an infection. There are 3 major classes of interferon — alpha, beta, and gamma.
- Alpha Omega Alpha
Alpha Omega Alpha: An honor society, the medical school equivalent of Phi Beta Kappa of undergraduate school.
- Alpha particle
Alpha particle: A tiny mass of material composed of two protons and two neutrons. Alpha particles do not travel very far from their radioactive source. They cannot pass through a piece of paper, clothes or even the layer of dead cells which normally protects the skin. Because alpha particles cannot penetrate human skin they are […]
- Alpha thalassemia
heme and globin. Globin is made up of 4 polypeptide chains. In normal adult hemoglobin (Hb A), the predominant type of hemoglobin after the first year of life, 2 of the globin polypeptide chains are identical to one another and are designated the alpha chains. The other 2 chains are also identical to one another […]