Final answer:
The plots used to describe ligand binding include the saturation curve, energy diagram, and fluorescence quenching versus concentration plot.
Step-by-step explanation:
When studying ligand binding, several common graphical representations can be used. One example is the saturation curve, which shows the binding of a ligand to a receptor. This curve depicts the relationship between ligand concentration and the occupancy of the binding site on the protein. Another example is the energy diagram, which compares the fluorescence of different ligands. By plotting the fluorescence intensity against the concentration of the ligand, we can understand the binding characteristics. Finally, the fluorescence quenching versus concentration plot is often used to measure the binding between a protein and a ligand. This plot shows how the fluorescence of the protein changes as the ligand concentration increases.