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#Question id: 27561


Some proteins contain additional amino acids that arise by modification of an amino acid already present in a peptide, examples include

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. 4 -hydroxy proline

  2. 5- hydroxy Lysine

  3. Gamma Amino Butyric Acid

  4. All of the above


Answer:- Option(s): 4


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