And all these identical antibodies will bind to a specific region, a specific epitope on that antigen. And this collection of identical antibodies that bind to a single epitope on that antigen are known as monoclonal antibodies. And this is in contrast to polyclonal antibodies because as we said, polyclonal antibodies are produced by different types of plasma cells. So we produce a different collection of these different types of antibodies. And even though these different antibodies are for a specific antigen, they can bind to different epitopes on that antigen. So this is the difference between monoclonal and polyclonal antibodies.