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quaternary structure

   Also found in: Medical, Encyclopedia, Wikipedia 0.03 sec.
quaternary structure
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.
quaternary structure
The structure that is formed by the joining together of two or more proteins or nucleic acids. The functions of the proteins and nucleic acids are only expressed correctly when they are joined together. See also primary structuresecondary structuretertiary structure


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