loop_ _pdbx_exptl_crystal_grow_comp.crystal_id _pdbx_exptl_crystal_grow_comp.sol_id _pdbx_exptl_crystal_grow_comp.comp_id _pdbx_exptl_crystal_grow_comp.comp_name _pdbx_exptl_crystal_grow_comp.conc _pdbx_exptl_crystal_grow_comp.conc_range _pdbx_exptl_crystal_grow_comp.conc_units 4 'protein' 1 'protein' 25. . 'mg/ml' 4 'protein' 2 'Tris HCl' 20. . 'millimolar' 4 'protein' 3 'NaCl' 0.2 . 'molar' 4 'precipitant' 1 'PEG 4000' 12.5 . 'percent_weight_by_volume' 4 'precipitant' 2 'MES' 0.1 . 'molar'