Each of the following are examples of post-translational modification of a protein EXCEPT which one?
A) formylation of N-terminal methionine
B) hydroxylation of proline in collagen
C) specific cleavage of a site along the polypeptide chain
D) formation of cystine
E) phosphorylation of a serine residue

Question

Quizplus · Accepted Answer

Formylation of N-terminal methionine is a modification that occurs during the initiation of protein synthesis in bacteria, not a post-translational modification. Post-translational modifications occur after a protein has been synthesized and include processes like hydroxylation, cleavage, formation of disulfide bonds (cystine), and phosphorylation.

Each of the Following Are Examples of Post-Translational Modification of a Protein