So we can inject two, four Dinitrophenol into the mouse, into the blood of the mouse by using a syringe. So we inject once we wait three weeks, we inject the second time, we wait three weeks. And after a total of six weeks we take another syringe and we draw blood from that mouse. Now, that blood will now contain the polyclonal antibodies against that antigen, against the two four Dinitrophenol. And now we can use the different types of purification techniques that we spoke about previously to basically isolate and study the polyclonal antibodies. For example, we can undergo self fractionation and differential centrifugation to basically isolate all the proteins from that blood mixture.