title: Synthesis of des(tetrapeptide B(1-4)) and des(pentapeptide B(1-5)) human insulins. Two biologically active analogues.
abstract: Two analogues of human insulin, des(tetrapeptide B(1-4))-and des (pentapeptide B(1-5))-insulin, which differ from the parent molecule in that the N-terminal tetrapeptide and pentapeptide sequences, respectively, have been eliminated, have been synthesized. The des(tetrapeptide B(1-4))-insulin shows potencies of 13 IU/mg by the mouse convulsion assay method and 7.6 IU/mg by the radioimmunoassay method. The des(pentapeptide B(1-5))-insulin possesses a potency of 1.2 IU/mg when assayed by the glucose-oxidation method in isolated fat cells and 3.7 IU/mg by the radioimmunoassay technique. The natural hormone has a potency of 23--25 IU/mg by both assay methods.
mesh_terms: D000273:Adipose Tissue / Q000187:drug effects / Q000378:metabolism; D000595:Amino Acid Sequence; D000596:Amino Acids / Q000031:analogs & derivatives / Q000032:analysis; D000818:Animals; D001681:Biological Assay; D005947:Glucose / Q000378:metabolism; D006801:Humans; D007328:Insulin / Q000031:analogs & derivatives* / Q000494:pharmacology; D051379:Mice; D009842:Oligopeptides; D011863:Radioimmunoassay; D013045:Species Specificity
chemical_list: D000596:Amino Acids; D007328:Insulin; D009842:Oligopeptides; D005947:Glucose