log.verbose()
env = environ()

den = density(env, file='1cuk-a2_8A.xplor', em_density_format='XPLOR',
              em_map_size=32)

den.grid_search(em_density_format='XPLOR', num_structures=1,
                em_pdb_name='1cuk-a2.pdb', start_type='CENTER',
                density_type='SPHERE',
                number_of_steps=1, voxel_size=1., resolution=8.,
                angular_step_size=30., temperature=0.,
                best_docked_models=1, em_fit_output_file='test-cr.log')