Affinity purified IgGs are provided at 200 µg in 0.5 ml volume for use as negative controls for Western blotting, immunoprecipitation and immunohistochemistry applications. Agarose conjugated IgGs are provided in 125 µl beads (0.5 ml) for use as negative controls in immunoprecipitation. HRP-conjugated IgGs are provided for use as negative controls in Western blotting and immunohistochemistry. Biotin and FITC conjugated IgGs are provided for use as negative controls in immunohistochemistry.