Selenocysteine,N-Formylmethionine and Pyrrolysine Are Found in Many Proteins

question 16

Multiple Choice

Selenocysteine,N-formylmethionine and pyrrolysine are found in many proteins.These amino acids are considered standard amino acids along with 20 common amino acids because they

• A)are incorporated into proteins from specific codons.
• B)are formed by post-translational modifications.
• C)play key roles in metabolism.
• D)are precursors of other important amino acids.

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