TABLE 3.

Summary of types of chemical contacts

TypeMain chain (%)Side chain (%)
Acid (D, E)12.037.0
Base (H, K, R)4.530.0
Polar (N, Q, S, T)4.33.2
Small (A, G)2.41.5
Aromatic N-P (F)0.61.2
Aromatic P (W, Y)0.42.7