Protein Z can bind to two ligand named V and W The two compl

Protein Z can bind to two ligand named V and W. The two complexes have the following Kd values: Kd(ZV) = 200 nM, and Kd(ZW) = 0.2 mu M. Which ligand has the highest affinity for protein Z? Explain.

Solution

Answer:

Both ligands have same affinity for the protein because 200nM=0.2uM.

1uM=1000nM as well as 1000nM =1uM, then 200nM = 0.2 uM. Both are in equal concentratiom. But they mention in different units.