loop_
    _citation.id
    _citation.coordinate_linkage
    _citation.title
    _citation.country
    _citation.journal_abbrev
    _citation.journal_volume
    _citation.journal_issue
    _citation.page_first
    _citation.page_last
    _citation.year
    _citation.journal_id_ASTM
    _citation.journal_id_ISSN
    _citation.journal_id_CSD
    _citation.book_title
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    _citation.book_id_ISBN
    _citation.details
      primary  yes
    ; Crystallographic analysis of a complex between human
      immunodeficiency virus type 1 protease and acetyl-pepstatin
      at 2.0-Angstroms resolution.
    ;
      US  'J. Biol. Chem.'  265  .  14209  14219  1990
      HBCHA3  0021-9258  071  .  .  .
    ; The publication that directly relates to this coordinate
      set.
    ;
      2  no
    ; Three-dimensional structure of aspartyl-protease from human
      immunodeficiency virus HIV-1.
    ;
      UK  'Nature'  337  .  615  619  1989
      NATUAS  0028-0836  006  .  .  .
    ; Determination of the structure of the unliganded enzyme.
    ;
      3 no
    ; Crystallization of the aspartylprotease from human
      immunodeficiency virus, HIV-1.
    ;
      US  'J. Biol. Chem.'  264  .  1919  1921  1989
      HBCHA3  0021-9258  071  .  .  .
    ; Crystallization of the unliganded enzyme.
    ;
      4 no
    ; Human immunodeficiency virus protease. Bacterial expression
      and characterization of the purified aspartic protease.
    ;
      US  'J. Biol. Chem.'  264  .  2307  2312  1989
      HBCHA3  0021-9258  071  .  .  .
    ; Expression and purification of the enzyme.
    ;