Figure 2.

The network system used for β-turn prediction. The network system consists of two networks: first-level sequence-to-structure network and second-level structure-to-structure network. Shaded circles indicate basic cell containing 20 + 1 units to code residues at that position in the window. Here, window size is nine. Square boxes indicate hidden layer containing 10 units. In second-level network, four units encode each residue. Solid circles indicate prediction obtained from first network; open circles, secondary structure state (coil, helix, and strand).