The comparison of predicted (dotted lines) and experimental values (solid lines) of phi and psi angles for three typical alpha-, beta-, and alpha/beta-proteins.

<p>Secondary structures of the proteins are signified at the lower part of each box, with coil, beta-strand, and alpha-helix residues represented by thin lines, thick lines, and thick curves, respectively. (A) phi angle for 1n7sD; (B) psi angle for 1n7sD; (C) phi angle for 1k5nB; (D) psi angle for 1k5nB; (E) phi angle for 1lj9B; (F) psi angle for 1lj9B.