Testing large numbers of new possible herbicides against a plant, or for example, testing all possible point mutations iNj of the many amino acids N in a binding site to j (amino type) from i 1 X-ray structures give those of a single frozen mode in complex with the protein. These are effectively low entropic and low temperature conformations and although informative do not give a full picture of a thermally populated set of bound conformations in biological conditions. Large sampling of conformational states through docking runs provide a more complete picture .