And those plasma cells, as they grow, they produce those antibodies that we want to study. So in this way, theoretically, we should be able to actually build as many specific antibodies as we'd like. Now, the problem with the method is, as soon as we take out that plasma cell from that organism, that plasma cell essentially dies. So the question is, how can we mass produce the monoclonal antibodies specific for some antigen? If the antigen producing cells, our plasma cells quickly die as soon as we take them out of that organism. So the trick is to basically somehow take the plasma cell that we isolated for that specific antibody and turn it into a cancer cell.