SYNTHESIS AND BIOLOGICAL ACTIVITY OF OVINE β-LIPOTROPIN-(41-91)-HENKAIPENTEKONTAPEPTIDE

Abstract
The 51-residue peptide ovine .beta.-lipotropin-(41-91) was synthesized by the solid-phase method in about 5% overall yield. The synthetic product was characterized by partition chromatography on agarose gel, TLC in 2 solvent systems, paper electrophoresis at 2 pH values, polyacrylamide gel electrophoresis, amino acid analyses of acid and enzymic hydrolysates, and bioassay for lipolytic and melanotropic activities. The synthetic peptide is about 5.4 times as active on a weight basis as ovine .beta.-lipotropin in the lipolytic assay [rabbit fat cells]. In the melanotropic assay [frog skin], it was about 2.4 times more active than the .beta.-lipotropin but only 5% as active as bovine .beta.-melanotropin. It had negligible opiate activity in the guinea pig ileum assay.