Now mono simply means we have a collection of identical plasma cells, so a single type of plasma cell and they produce identical antibodies which bind to an identical epitope found on that specific antigen. But when it comes to Polycal antibodies, polymers, we have a collection of different types of plasma cells and so they produce these different types of antibodies for that specific antigen and they combine to all different types of epitopes found on that specific antigen. So this is the main difference between monoclonal and polyphonal antibodies. Now the question is how can we mass produce our monoclonal antibody? So suppose we want to study a specific type of antibody that binds to a specific type of antigen. To actually study that antibody, the monocle antibody, we have to mass produce that antibody.