a plasmid containing human preproinsulin cdna inserted into the endonuclease pst i site of the ampicillinase gene of plasmid pbr322 was modified by excision of large portions of the ampicillinase-coding region to produce a variety of gene fusion combinations , many of which generated proteins detectable with antisera to insulin or human c peptide .
C0086418
human
C0006558
c peptide