... aminoacid signal peptide and a 68 amino acid peptide belonging to the insulin family (Fig. 3C). If the signal peptide is eliminated and disulfide bridges are formedas in other insulin family peptides, ... growth factor-like peptide; BrdU,bromodeoxyuridine; DAPI, 4¢,6-diamidino-2-phenylindole; DILP, Drosophila insulin-like peptide; IGF, insulin-like growth factor; ILP, insulin-like peptide; qRT-PCR, ... thesepeptides have similar amino acid sequences, they havedistinct domain organizations and physiological func-tions: insulin is a heterodimeric peptide consisting ofan A-chain and a B-chain,...