And let's make sure that the yield didn't decrease by too much. So if we have at least 30% here, that is a good procedure. So let's take a look at E to calculate this. We take this divided by two and we get 35,000. So we see that in fact, this procedure has a high specific activity. And that makes sense because affinity Chromatography separates these enzymes based on their ability to bind to specific enzymes.