Isolation and Characterization of Acetylated Derivative of Recombinant Insulin Lispro Produced in Escherichia coli.

Purpose Insulin lispro is a rapid-acting insulin analogue produced by recombinant DNA technology. As a biosynthetic drug, the protein undergoes strict monitoring aiming for detection and characterization of impurities. The goal of this study was to isolate and identify a derivative of insulin lispro formed during biosynthesis.