Multiple choice

Which of the following is a non-standard amino acid not found in proteins?

  1. Lanthionine

  2. Proline

  3. Glycine

  4. Valine

  5. Alanine
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A Correct answer
Explanation

Non-standard amino acids refer to those amino acids that have been chemically modified after they have been incorporated into a protein and those amino acids that occur in living organisms but are not found in proteins.

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