Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany. marcilio@dimap.ufrn.br|Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany. marcilio@dimap.ufrn.br|Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany. marcilio@dimap.ufrn.br|Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany. marcilio@dimap.ufrn.br|Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany. marcilio@dimap.ufrn.br