Fig. 4.

Performance of the distance-dependent potential as a function of its interaction centers. The atom types whose coordinates were used as the interaction centers are listed on the x-axes. The potentials were calculated as specified in Table 1 except for the varying interaction centers and the potential range of 15 Å. The results for the four 100/100 test sets with models of increasing size are indicated by bars of increasing darkness; the results for the 400/400 set of test models are indicated by the black bars.