AutoDock has been widely-used and there are many examples of its successful application in the literature (see References); in 2006, AutoDock was the most cited docking software. It is very fast, provides high quality predictions of ligand conformations, and good correlations between predicted inhibition constants and experimental ones. AutoDock has also been shown to be useful in blind docking, where the location of the binding site is not known. Plus, AutoDock is free software and version 4 is distributed under the GNU General Public License; it easy to obtain, too.