loop_
    _struct_biol_keywords.biol_id
    _struct_biol_keywords.text
      1  'aspartyl-protease'
      1  'aspartic-protease'
      1  'acid-protease'
      1  'aspartyl-proteinase'
      1  'aspartic-proteinase'
      1  'acid-proteinase'
      1  'enzyme'
      1  'protease'
      1  'proteinase'
      1  'dimer'
      2  'drug-enzyme complex'
      2  'inhibitor-enzyme complex'
      2  'drug-protease complex'
      2  'inhibitor-protease complex'
      3  'drug-enzyme complex'
      3  'inhibitor-enzyme complex'
      3  'drug-protease complex'
      3  'inhibitor-protease complex'