def get_element(self, element_id):
        element_coordinates = self.structure_ensemble.getCoordsets()[element_id]
        structure = self.structure_ensemble.copy()
        removeAllCoordsetsFromStructure(structure)
        structure.addCoordset(element_coordinates)
        return structure
We must override this guy. In this case the behaviour is to obtain a 
dataset/ETHPy150Open victor-gil-sepulveda/pyProCT/pyproct/data/handler/protein/proteinEnsembleData.py/ProteinEnsembleData.get_element