Cellular Macromolecules

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What does the secondary structure of proteins mean?

  1. Linear sequence of amino acids belonging to a peptide chain
  2. Folding of linear polypeptide chain into specialised coiled structure
  3. The arrangement and interrelationship of twisted chains into specific loops and bends
  4. Presence of more than one polypeptide chain
  5. Integration of a prosthetic group in the polypeptide chain
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