As Bio-Techne, we have united multiple brands to provide a unique and comprehensive product portfolio. Our Life Science brands include R&D Systems, Novus Biologicals, Tocris Bioscience, ProteinSimple and Advanced Cell Diagnostics. R&D Systems entered the field of biotechnology early, becoming the first company to commercially market the multifunctional cytokine TGF-beta 1. R&D Systems has since established itself as a developer and manufacturer of high-quality proteins and the world leader in immunoassays as well as a producer of antibodies, arrays, stem cell products, cell selection and detection products among other cell biology tools.