Thermo Scientific Open Biosystems offers bacterial and mammalian protein expression services as part of our custom antibody development platform. Protein antigens are essential starting components for many antibody applications such as EIA and other specific quantitative protein measurement assays. Simply use our gene search tool to find the gene(s) of interest to you, and let us do the rest. Coding regions are subcloned into suitable expression vectors and optimized for protein expression. Custom Protein Expression Options