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quaternary structure


from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The structure formed by the noncovalent interaction of two or more macromolecules, such as that formed by four globin protein molecules to make hemoglobin or that formed by histones interacting with DNA to make a nucleosome.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The arrangement of multiple folded or coiled proteins to form a multi-subunit complex


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