And finally, all the way here, we have the r, which is arginine. And that makes sense because arginine is the most basic and aspartate is the most acidic. So step two basically allows us to actually separate our amino acids into different containers. And now we know what amino acid is found in which one of our containers, so we know which amino acids we have. The next question is, how many of each amino acids do we have in that beaker? So we want to count up those amino acids, and that's exactly what we do in step three.