<prompt> Which of the following is an example of post-translational modification?Glutamate to GlutamineProline to HydroxyprolineAspaate to AsparagineLeucine to Isoleucine  <response>: Proline has its own codons, hydroxy proline does not have. hydroxyproline is formed from proline by post-translational modification. Glutamate to glutamine is mutation, not post-translational modification. The same is true for option c and d. 