Which of the following special amino acid is not formed by post-translational modification?: (A) Triodothyronine, (B) Hydroxyproline, (C) Hydroxylysine, (D) Selenocysteine
Answer is D. Ans. D. SelenocysteineSelenocysteine is formed by cotranslational modification. All others are derived amino acids. Derived amino acids are formed by post-translational modification.