So we are now able to actually determine exactly what the sequence of nucleotides is in any DNA molecule. Now, how is that useful in itself? Well, if we want to study a specific gene we have to know what the sequence of nucleotides is in that gene. 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.