And let's use purple for that. Okay? So what that means is this extracted mixture, following these processes up to this point is 85 times as pure as this initial mixture. And finally, let's carry out the final one. So in the final step, in step E, we take our extracted mixture of proteins and we expose it to affinity Chromatography. And in affinity Chromatography, we separate our proteins based on their specific ability to bind to these special molecules.