_pdbx_exptl_crystal_cryo_treatment.crystal_id 4 _pdbx_exptl_crystal_cryo_treatment.final_solution_details ; 25% (v/v) glycerol in precipitant solution ; _pdbx_exptl_crystal_cryo_treatment.soaking_details ; A series of 1 min soaks beginning at 5% (v/v) glycerol in precipitant, transiting to 20% (v/v) glycerol, and finally to 25% glycerol ; _pdbx_exptl_crystal_cryo_treatment.cooling_details ; Direct immersion in liquid nitrogen ; _pdbx_exptl_crystal_cryo_treatment.annealing_details ?