And then we take a pipette. We take a small sample out of that mixture, and we place it into a special apparatus that is able to absorb light or determine how much light is actually absorbed. And so we shine light at a specific wavelength, it absorbs them, and we determine how much is absorbed. And we do it with every one of these beakers. And then we plot it on an x y axis, where the y axis is the absorption of light, and the x axis is the type of amino acid we actually use. And so what we see is the higher our value is, the higher this slope is, the higher our absorption is.