title: Human proinsulin, VII: synthesis of two protected peptides corresponding to the sequences 1--45 and 46--96 of the prohormone.
abstract: The synthesis of two protected large peptides 1--45, and 46--86 covering the entire amino acid sequence of human proinsulin is described. Peptide 1--45, was synthesized from two intermediate fragments 1--23 and 24--45 and purified by countercurrent distribution in dimethylformamide system (K = 0.5). Peptide 46--86 was synthesized from two intermediate fragments 46--70 and 71--86 and purified by countercurrent distribution in two solvent systems, the dimethylformamide system (K = 0.06), and the toluene system (K = 0.16).
mesh_terms: D000595:Amino Acid Sequence; D006801:Humans; D010446:Peptide Fragments / Q000378:metabolism*; D011384:Proinsulin / Q000138:chemical synthesis*
chemical_list: D010446:Peptide Fragments; D011384:Proinsulin