The experimental data basically gives us the following curve. And what this curve tells us is there is an abrupt change in the relative absorbance at a specific temperature value. And that's exactly why we call this dissociation process melting, because melting describes the process by which we essentially dissociate this DNA molecule very quickly at a specific temperature value. And that temperature value is about 72 degrees Celsius. That's the melting temperature of the DNA molecule, as shown in the following diagram. So this temperature value describes this point on a curve.