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Question

What is meant by secondary structure of proteins ?

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Solution

Secondary Structure: Secondary structures are formed when the flexible positional thread folds to form structures like helices and sheets.

Important features of secondary structures:

  • 3D arrangement of only the polypeptide main chain
  • Determined by hydrogen bond interactions between adjacent amino acid residues in the polypeptide chain
  • Polypeptide chain can arrange itself into characteristic repeating patterns such as helices, or pleated sheets
  • Two basic secondary structures that are stabilized by hydrogen bonds

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