loop_ _map.id _map.details rho_calc ; density calculated from F_calc derived from the ATOM_SITE list ; rho_obs ; density combining the observed structure factors with the calculated phases ; loop_ _map_segment.map_id _map_segment.id _map_segment.array_id _map_segment.binary_id _map_segment.mask_array_id _map_segment.mask_binary_id rho_calc rho_calc map_structure 1 mask_structure 1 rho_obs rho_obs map_structure 2 mask_structure 1