Studies on peptides. CXXVII. Synthesis of a tripentacontapeptide with epidermal growth factor activity.

Abstract
The tripentacontapeptide corresponding to the entire linear sequence of epidermal growth factor was synthesized by assembling 15 peptide fragments and one His residue (position 22), followed by deprotection with trifluromethanesulfonic acid-thioanisole in trifluoroacetic acid. The deprotected peptide was subjected to air-oxidation. After purification by ion-exchange chromatography of diethyl aminoethyl cellulose folloed by high performance liquid chromatography, a peptide with powerful anti-gastric activity was obtained.