StabilGuard? Immunoassay Stabilizer (BSA-Free) effectively preserves the conformation and activity of dried proteins while simultaneously blocking the surface to reduce non-specific binding. It can be used to stabilize antibodies, antigens or enzymes on an assortment of immunoassay components including polystyrene plates, tubes, glass, membranes, and filter paper. The key benefit of the protein free formulation is the elimination of interference and cross reactivity within immunoassay applications.