A Solid-Phase Protein Synthesis Reaction Cycle Includes_______________

A solid-phase protein synthesis reaction cycle includes_______________.

A) washing steps
B) deprotection of the peptide amino terminus using piperidine
C) activation of the carboxy group on the amino acid monomer to be added to the growing peptide
D) coupling of the activated amino acid with the amino group of the growing peptide polymer
E) all of the above