Proteins are biomolecules that perform variety of functions in an organism, thus have been constant subject of study for understanding biological systems as well as used for biopharmaceutical applications.
Recombinant DNA technology allows the ease of production of desired proteins in suitable expression systems. Production involves the insertion of foreign genes to another host expression system, such as bacteria or mammalian cell line.
The choice of expression platform is important for the efficient production of the protein. The presence of several elements constitute expression systems such as genes, markers, and control sequences creates a wide range of expression systems available for R&D and large-scale production. Different expression systems include bacteria, yeast, insect, and mammalian.