Helix, sheet, and polyproline II frequencies and strong nearest neighbor effects in a restricted coil library.
Jha AK, Colubri A, Zaman MH, Koide S, Sosnick TR, Freed KF. Helix, sheet, and polyproline II frequencies and strong nearest neighbor effects in a restricted coil library. Biochemistry. 2005 Jul 19; 44(28):9691-702.