Diagnostic Biosystems (DBS) is a US based biotechnology company. It is engaged in providing specialty immunohistochemistry (IHC) reagent for the clinical use such as, research and clinical pathology. The company is focused on high quality antibody development and production of new multiplex staining reagents. DBS offers clinically applicable tools for pathology including, monoclonal and polyclonal antibodies, ancillary reagents for high quality immunostaining and a wide variety of detection systems. The custom monoclonal and polyclonal antibody production services offered by the company include in vitro and in vivo antibody production, peptide synthesis, purification and conjugation. DBS is an FDA registered medical device manufacturer, operating under FDA 21CFR Part 820 Quality System Regulations. The company is certified under ISO 9001:2000 Quality Management System International standards, manufacturing CE marked medical devices, for the European market. DBS is headquartered at Pleasanton in California, the US.