Once a tumour starts to break apart, once it starts to move and regrow, the surface of these cells contains a unique fingerprint, so there are molecules that are unique to it. With nanos, if you know what those molecules are, you can colour them with, let's say, the five different colours that we show and you can inject a bolus, a combination of these markers that have different targets on it. It'll travel through the body and then hopefully it'll find the different targets and you can colour-label them. That's one example of how it's used.
This is where basic research becomes very important, because we still don't fully understand how the particles move within the body once you inject them. We know they can move very freely because of size. Your body is basically full of compartments. It can access certain things. We don't understand that. If you develop this thing, it may also have side effects. If it goes into compartments that are protected, that you normally can't access, it causes problems.
The fundamental studies to understand how to design the particles will allow you to better design your structures. But, at the end of the day, it's when nano combines with biology. The genomics guys and the proteomics guys need to find these targets. We now hook this up to our particle, inject it together, combine it into the system, which then allows us to light up the disease.