Which of the following is true about uncommon amino acids?
A) They are found in all proteins
B) When they are found in proteins, they are first created by modification of the parent amino acid and then incorporated into the protein
C) They are formed in the protein by post-translational modification of the parent amino acid
D) They are always based on modification of tyrosine
E) none of the choices

Question

Quizplus · Accepted Answer

Uncommon amino acids, which are not directly coded by DNA, are typically formed in proteins through post-translational modifications of the standard amino acids. This process allows for the diversification of protein function and structure beyond what is directly encoded by the genome.

Which of the Following Is True About Uncommon Amino Acids