| X-RAY DIFFRACTION |
7.4 |
298 |
1.5 microliters of RebC (9 mg/mL in 150 mM NaCl, 10% glycerol, 25 mM HEPES pH 7.5) was incubated with 0.35 microliters of guanidine-HCl for 30 seconds, followed by addition of 1.5 microliters of precipitant solution (19% PEG-8000, 0.1 M HEPES pH 7.4), without mixing, at room temperature and sealed over a precipitant well solution. Immediately after set up, crystal trays were placed on a gel shaker and then, after 12 hours, transferred to a storage space in vibration-isolation. A crystal was then soaked in 19% PEG-8000, 0.1 M HEPES pH 7.4, and 1 mM K252c for 11 days. The crystal was then soaked for 5 seconds in a cryogenic solution containing 19% PEG-8000, 0.1 M HEPES pH 7.4, 20% glycerol, and 1 mM K252c and then flash-frozen in liquid nitrogen., VAPOR DIFFUSION, HANGING DROP, temperature 298K |
