Now let's move on to C. In C, we take that extracted mixture following salting out and we expose that to ion exchange chromatography. And an ion exchange chromatography. We basically separate our protein mixture based on the net charge. And so based on our electrophoresis setup we see that following ion exchange chromatography, when we extract that mixture and place it into this, well, we produce this distribution of bands. And because we decrease the number of bands we see, that means we remove some of those proteins. And so we are purifying our mixture.