Posttranslational modifications to proteins include all of the following,except
A)glycosylation.
B)phosphorylation.
C)amino acid derivatization.
D)peptide joining.
E)proteolysis.

Question

Quizplus · Accepted Answer

Peptide joining is not a posttranslational modification. It refers to the covalent linkage of amino acid residues during protein synthesis to form a polypeptide chain. The other options, glycosylation, phosphorylation, amino acid derivatization, and proteolysis, all involve chemical modification of the protein after it has been synthesized.

Posttranslational Modifications to Proteins Include All of the Following,except