Biosensor plasmon RUs determined for (A) human or (B) rat TNF, or (C) human LTα binding by MBP-ECT or MBP-CPV or concentrates of culture fluids from cells infected with VAC, CPV, or ECT. Peak RU values after immobilizing ligand (black), after sample ligand-binding (white), and after reaction with IgG from anti-MBP-CPV serum (gray) are shown (TNFRI/Fc and MBP, positive and negative controls).