And in cell fractionation there are two important steps. In the first step we have to form a homogeneous. And the way that we form a homogeneous is in the following manner. We take a test tube and we place the cells inside the test tube as shown in the following diagram. And then we expose the cells to some type of grinding or mixing process. And what that does is it breaks down and ruptures the cell membranes of the cells, exposing all the different types of components and mixing all these different types of components found inside the cells.