Successful scientific studies rely on reagent quality and reproducibility. As the market increasingly fills with reagent producers, there has been growing demand to apply additional levels of analysis to existing quality control assays. Biosensors have been used effectively in both academic and pharmaceutical development labs for many years to measure the binding properties of reagents. Recently, Bio-Techne began investigating product performance using SPR technology in a wide variety of assays. A novel surface has been developed which allows capture of any species antibody, thereby increasing efficiency and flexibility in assay design. Assays investigating natural and recombinant proteins and antibodies will be presented, as well as specific, customer-driven cases to support reagent performance.