Based on immunoelectrophoresis and/or ELISA, the antibody reacts with whole molecule alpaca IgG, and with llama IgG. The antibody reacts primarily with the Fc region, and is not recommended for detection of VHH antibodies. No antibody was detected against non-immunoglobulin serum proteins. The antibody has been tested by ELISA and/or solid-phase adsorbed to ensure minimal cross-reaction with bovine, human, mouse, rabbit, and rat serum proteins, but it may cross-react with immunoglobulins from other species.