alpha helix(redirected from Alpha helical)
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A secondary structure of proteins, characterized by a single, spiral chain of amino acids stabilized by hydrogen bonds.
[From alpha-form, the form taken by unstretched protein molecules.]
al′pha-hel′i·cal (-hĕl′ĭ-kəl, -hē′lĭ-) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Biochemistry) biochem a helical conformation of a polypeptide chain, found abundantly in the structure of proteins
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the spatial configuration of many protein molecules in which the polypeptide backbone is stabilized by hydrogen bonds between amino acids in successive helical turns.
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