[HOME]

- Protein backbone structures are approximated by polygonal
chains
in R
^{3}, where successive line segments could form any spatial conformation. - To classify local protein structures, another process of discretization, i.e., clustering of polygonal chains, is required.

Approximation by a polygonal chain |

- Local protein backbone structures are approximated by a trajectory of a vector field defined on a quantized space.
- We could classify local protein structures simply by computing the second derivative, and no further quantization is required.

Quantization of the background space |