For instance, let's suppose a patient has some sort of tumor in their body, and a tumor is basically a collection of these cancerous cells. And so we can build these liposomes, and we can direct these liposomes to the cancerous cells of the tumor. And what happens is because the cells of the tumor are basic, also contain the same phospholipid bilayer membrane, these liposomes confuse with the cell membranes of those cancerous cells and that can in turn inject whatever drug is found inside the internal aqueous compartment into those cancerous cells and that can kill off those cancerous cells. So the point is, liposomes can be used to study the properties of cell membranes or they can be used to deliver drugs to patients. Now, the final thing I'd like to mention about liposomes is we can also actually build liposomes that contain proteins embedded inside the liposome. And we can use these types of protein liposome structures to study the properties of the proteins that exist within the cells of our body, within the cell membranes of our body.