And the protein that we want to actually locate is found within the cells. So the way that we're going to isolate the proteins from inside the cells is by fractionating our cells and then placing that fraction into a differential centrifuge machine. And then as a result of centrifugation, we're going to basically isolate the proteins found inside our cell. Now, once we isolate the protein sample, we take the sample of proteins and place it into a gel electrophoresis setup. So we use SDS polyacrylamide gel electrophoresis and that allows us to use an electric field to separate the proteins based on their size. So this is what we get following our gel electrophoresis experiment.