<prompt> All of the following are transaminated EXCEPT:d- amino group of ornithinea- amino group of prolinea- amino group of serinea- amino group of cysteine  <response>: Only a amino group takes pa in transamination. Except:- d -amino group non-a of ornithine takes pa in transamination, where enzyme is OAT Ornithine Amino Transferase. Out of the 20 amino acids, 3 amino acids do not take pa in transamination. Proline Lysine Threonine 