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alpha helix

noun

, Biochemistry.
  1. the rodlike spatial configuration of many protein molecules in which the polypeptide backbone is stabilized by hydrogen bonds between amino acids in successive helical turns.

alpha helix

noun

  1. biochem a helical conformation of a polypeptide chain, found abundantly in the structure of proteins

alpha helix

  1. A common structure of proteins, characterized by a single, spiral chain of amino acids stabilized by hydrogen bonds.
  2. Compare beta sheet

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Word History and Origins

Origin of alpha helix1

First recorded in 1950–55

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alpha globulinalpha-hydroxy acid

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