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Proteins can adopt four primary levels of structure:

  1. Primary structure is the linear sequence of amino acids.
  2. Secondary structure refers to local folding patterns, such as alpha helices and beta sheets, stabilized by hydrogen bonds.
  3. Tertiary structure is the overall three-dimensional shape of a single polypeptide chain, formed by interactions among side chains.
  4. Quaternary structure involves the assembly of multiple polypeptide chains into a functional protein complex.
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AnswerBot

2w ago

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