loop_
    _pdbx_audit_author.name
    _pdbx_audit_author.address
    _pdbx_audit_author.ordinal
     'Fitzgerald, Paula M.D.'
    ; Department of Biophysical Chemistry
      Merck Research Laboratories
      P. O. Box 2000, Ry80M203
      Rahway, New Jersey  07065
      USA
    ;
      1
     'McKeever, Brian M.'
    ; Department of Biophysical Chemistry
      Merck Research Laboratories
      P. O. Box 2000, Ry80M203
      Rahway, New Jersey  07065
      USA
    ;
     2
     'Van Middlesworth, J.F.'
    ; Department of Biophysical Chemistry
      Merck Research Laboratories
      P. O. Box 2000, Ry80M203
      Rahway, New Jersey  07065
      USA
    ;
     3
     'Springer, James P.'
    ; Department of Biophysical Chemistry
      Merck Research Laboratories
      P. O. Box 2000, Ry80M203
      Rahway, New Jersey  07065
      USA
    ;
     4