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Validation with respect to random perturbation of positions of site-points. Random perturbations of site points for (a) a 54 atom ligand(PP8) and (b) a 34 atom ligand(MTX). PMScores for perturbed sites with respect to its original site for different extents of perturbations(RMSD) are shown at different values of τ (1.0-green,0.5-red,0.25-cyan,0.125-blue,0.01-yellow).
