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 random coil

Word History and Origins

Origin of alpha helix¹

First recorded in 1950–55

Example Sentences

One common feature is a spiral stretch of amino acids called an alpha helix.

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It seemed almost unbelievable that the DNA structure was solved, that the answer was incredibly exciting, and that our names would be associated with the double helix as Pauling’s was with the alpha helix.

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Every spiraling alpha helix, every knobby amino acid, all the nooks and crannies.

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At just 125 feet long, the Alpha Helix could carry only 15 scientists and was undersized for the waters where crab fishermen of "Deadliest Catch" earn their money.

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The Sikuliaq, built by Marinette Marine Corp. in Marinette, Wisconsin, has berths for 26 researchers, a crew of 20, and features lacking on the Alpha Helix.

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