Now, the question is, if we want to isolate and study a specific type of gene, let's say a single gene within that particular genome, how exactly can we go about doing that? How can we find find that gene, isolate that gene and then make many copies so that we can actually study and experiment with that gene? Well, one way to do it, the common way to do it is to first build a genomic library for that particular genome and then we can use that genomic library to basically screen for that specific gene, to find that gene and then to isolate and make copies of that gene. So let's begin by discussing how to actually make that genomic library. So let's begin with step one. Let's suppose in a single beaker we have a solution that contains that complete genome.