So in step number two, the solution is cooled to about 54 degrees Celsius and the DNA primers are added. So they're basically floating around. And once we cool our solution to that temperature, those DNA primers are now at an optimal temperature where they can begin binding onto the flanking sequences. Now the question is where exactly will these DNA primers actually bind to? Well, the sequence of the DNA primers are complementary to this flanking sequence and this flanking sequence here. And so what we see is one of the primers that has a complementary sequence to this one binds onto this end and the other one binds onto the opposite end of this complementary single strand of DNA.