Enrichment factor calculated for different percentiles. A, the average EF of 75 query pockets using different combinations of the distance threshold and the surface properties. t0.2, t0.3 shows results using the threshold distance of 0.2 and 0.3, respectively; "no t" shows the result when no threshold is used. Two surface property combinations are used: all four properties, the shape, hydrophobicity, the electrostatic potential, and the visibility, and only using the shape information. B, EF for each of the ligand types in the test dataset using the distance threshold of 0.2 and all the four surface properties.