Before revision: 10.1021/ja1116233  state-of-the-art classification methods coming from the field of structural pattern recognition, with the aim to compare different representations of the same proteins of the Niwa et al. data base , going from pure sequence to chemico-physical labeled (contact) graphs  .
After revision: 10.1021/ja1116233 state-of-the-art classification methods coming from the field of structural pattern recognition, with the aim to compare different representations of the same proteins of the Niwa et al. data base ; such representations include sequences and labeled (contact) graphs .