Chapter 2: Biological molecules
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Last updated 3:28 PM on 10/28/25
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4 Terms
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Quaternary structur
is the three-dimensional arrangement of two or more polypeptides, or of a polypeptide and a non-protein component such as haem, in a protein molecule.
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Primary structure
Primary structure is the sequence of amino acids in a polypeptide or protein.
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Secondary structure is the structure of a protein molecule resulting from the regular coiling or folding of the chain of amino acids, e.g. an α-helix or β-pleated sheet.
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Tertiary structure
Tertiary structure is the compact structure of a protein molecule resulting from the three-dimensional coiling of the already-folded chain of amino acids.
