Table 1.

The optimized distance-dependent statistical potential

Parameter	Value
interaction centers	Cα and Cβ
residue type classification	20 standard residue types
range	30 Å
resolution	0.50 Å
sequence separation k, derivation	3, 4, 5, 6, 7, 8, ≥9
reference state	other atoms
sequence separation k, use	3, 4, 5, 6, 7, 8, ≥9

The listed parameters are optimal for all sizes of the tested models. The potential was calculated from the sma-med-lar set of known protein structures, unless specified otherwise. The optimal performance for a given model size is obtained by deriving the potential only from the known structures of similar size.