And we call this a complementary DNA molecule or simply CDA. And then we form the second strand of that DNA molecule to form a double helix and we introduce this into an appropriate vector. So either a plasmid or a lambda phage. And now we take that and bring it into our bacterial cell. And notice when the bacterial cell reads this gene, the gene shown in red, it will produce the mRNA molecule that is already fully modified that only contains those exons and not the introns. And so now, because it doesn't have to worry about removing the introns and slicing together the exons and it doesn't have to worry about the polyatail or the five prime cap, it can easily synthesize that protein that we wanted to basically produce.