loop_
     _pdbx_supporting_exp_data_set.ordinal
     _pdbx_supporting_exp_data_set.data_content_type
     _pdbx_supporting_exp_data_set.data_version_major
     _pdbx_supporting_exp_data_set.data_version_minor
     _pdbx_supporting_exp_data_set.details
     1  'X-ray structure factor amplitudes'  1 2 ?