Invitrogen introduces its OptiCHO Express Kit designed for production of high yields of therapeutic proteins from CHO DG44 cells. The new, 10-reaction OptiCHO Express Kit comes complete with a detailed protocol, cloning vector, reagents, cells and media all fully optimized to work together. This kit allows users to efficiently transfect CHO DG44 cells in a serum-free environment, as well as rapidly develop stable, high expression cell lines. This means manufacturers of therapeutic protein could generate the maximum amount of protein in the shortest possible time, potentially saving up to six months of development time when compared to current methods.