So what we want to do is we want to separate the two strands of DNA. So let's suppose this is the DNA molecule, our target DNA molecule, and this intersection is basically the target sequence. It's the sequence of nucleotides that we want to replicate. Now these parts are basically known as the flanking sequence. And the reason they're called flanking sequence is because they're found right next to the target sequence. And those primers are actually going to bind to these flanking sequences as we'll see in just a moment.