Multi-rAb Recombinant Secondary Antibodies are mixtures of precisely engineered recombinant monoclonal antibodies that recognize multiple complementary epitopes on the same IgG. Each recombinant clone in the final multiclonal mixture is carefully selected after rigorous characterization and screening to ensure the highest level of performance. The selected clones are mixed in various combinations, each of which is then functionally characterized in multiple applications to select the final multiclonal mixture with optimal performance. Each lot of Multi-rAb Secondary Antibodies is produced by mixing the same high performing recombinant clones every time to ensure that they have high batch-to-batch consistency, which in turn results in high reproducibility of experimental data.