. . . "ved from the support by treatment with HF/anisole and purified under standard conditions to yield the desired polypeptide.C. Side group N-R analogs of polypeptidesIn general, the synthesis of side group N-R analogs of polypeptides, where R is an alkyl or aryl group, involves reacting a resin-bound protected amino acid featuring a side chain containing a free amino group, or a resin-bound polypepti" . .