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secondary structure

noun, Biochemistry.
the arrangement of a polypeptide into a regular alpha helix, beta structure, or random coil configuration by the formation of intramolecular hydrogen bonds along the length of the chain. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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secondary structure in Science
secondary structure  
  1. The protein structure characterized by folding of the peptide chain into an alpha helix, beta sheet, or random coil. See also primary structure, quaternary structure, tertiary structure.

  2. The folded, helical structure of double-stranded DNA.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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