And by using a specific method that we're going to focus on in a future lecture, we can basically determine what the sequence of nucleotides is in any gene. And once we know what the sequence of nucleotides in that DNA is we can then determine what the corresponding sequence in the RNA will be. And we can use that and the genetic code to basically determine what the structure and the sequence of the protein is that is encoded by that gene. So this allows us to basically study how gene expression takes place and how we synthesize and which proteins we actually synthesize. Now this also leads us into factor number three. So now that we know what the specific nucleotide sequence of that DNA molecule is we can now synthesize that DNA molecule from scratch in the laboratory by using a method known as solid state method.