loop_
    _pdbx_chem_comp_feature.comp_id
    _pdbx_chem_comp_feature.type
    _pdbx_chem_comp_feature.value
    _pdbx_chem_comp_feature.source
	00X   'ENZYME INHIBITED'    'ASPARTIC PROTEINASE'                     PDB
        00X   'FUNCTION'            'Transistion-state analogue inhibitor'    PDB
        00X   'STRUCTURE IMAGE URL' 'http://journals.iucr.org/00X.jpg'        IUCR