The production of proteins in mammalian cells is an important tool in numerous scientific and commercial areas. For example, the proteins expressed in and purified from mammalian cell system are routinely needed for life science research and development. In the field of biomedicine, proteins for human therapy, vaccination or diagnostic applications are typically produced in mammalian cells. Gene cloning, protein engineering, biochemical and biophysical characterization of proteins also require the use of gene expression in mammalian cells. Other applications in widespread use involve screening of libraries of chemical compounds in drug discovery, and the development of cell-based biosensors. Yrbio offers mammalian cells expression service which can provide mg grade proteins within 4 week. For more proteins, Yrbio can provide stable expression cell lines.