Consider the binding reaction L + R → LR, where L is a ligand and R is its receptor. When 1 X 10^-3 M L is added to a solution containing 5 X 10^-2 M R, 90 percent of the L binds to form LR. What is the K cq of this reaction? How will the Keq be affected by the addition of a protein that facilitates (catalyzes) this binding reaction? What is the dissociation equilibrium constant Kd?