Well, we solved this problem by essentially using an enzyme found in retroviruses known as reverse transcriptase. And what this enzyme does is it basically reverse transcribes. It forms a complementary DNA molecule from an mRNA molecule. So basically the way that we solve the problem is we take the eukaryotic cell that produces the proteins that we essentially want to extract and we extract the fully modified mRNA molecule that contains the polyatail, the five prime cap, and only the exxons, not the introns. And so this is that molecule shown on the board. And now we expose it to reverse transcriptase which will basically form a DNA molecule that is complementary to this mRNA.