loop_ _refine_occupancy.pdbx_refine_id _refine_occupancy.class _refine_occupancy.treatment _refine_occupancy.value _refine_occupancy.details 'X-RAY DIFFRACTION' 'protein' fix 1.00 . 'X-RAY DIFFRACTION' 'solvent' fix 1.00 . 'X-RAY DIFFRACTION' 'inhibitor orientation 1' fix 0.65 . 'X-RAY DIFFRACTION' 'inhibitor orientation 2' fix 0.35 ; The inhibitor binds to the enzyme in two alternative conformations. The occupancy of each conformation was adjusted so as to result in approximately equal mean thermal factors for the atoms in each conformation. ;