And then we can force those cells to divide via binary fission and that will replicate our DNA of interest. And at the end, we can extract that DNA. And now we have many, many copies of that DNA fragment. So this is one out of the many different ways that we can use these different genes as markers. Now, let's move on to the second type of plasma that is more commonly used because it is actually more versatile than this plasma here. So we have PUC 18 plasma.