Figure 5. Schematic representation of convergent synthesis of peptides.: resin; : functional group in the resin; : N^α amino protecting group; (Cl or NH₂);  side-chain protecting groups; 1: cleavage and purification; 2: N^α deprotection; 3: Coupling; 4:  N^α deprotection, cleavage, side-chain deprotection, purification.