from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The protein structure characterized by folding of the peptide chain into an alpha helix, beta sheet, or random coil.
- noun The folded, helical structure of double-stranded DNA.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biochemistry The general
three-dimensionalstructure of a biopolymersuch as DNAor a protein.
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