Synthesis of a 21-Residue Fragment of Human Proinsulin by the Polyamide Solid Phase Method

Abstract
The synthesis of human proinsulin fragment residues 40-60 by a solid phase method based on polydimethylacrylamide is described. Of the amino acids, 19 were introduced as N.alpha.-(9-fluorenylmethoxycarbonyl) derivatives; functional side chains were protected as t-butyl ethers and esters. The yield of highly purified 21-residue peptide was 56.5%.