Fig. 2.
Test systems: a) system 1: water tetramer in which one water w1 is assigned as molecule A and three waters (w2-w4) as molecule B and b) system 2: Ace-Ala-NMe and a water molecule. Dotted ellipses indicate the non-overlapping centers and rectangles the corresponding model molecules. The interatomic distances between heavy atoms connected by dashed lines are shown in Å.
