| X-RAY DIFFRACTION |
6.5 |
293 |
CRYSTALS WERE GROWN AT 20 DEGRRES C USING THE VAPOR DIFFUSION METHOD IN HANGING DROP MODE BY MIXING 1 MICROLITER PROTEIN (20 MG/ML) IN 20 MM HEPES, PH 7.0, 0.1 M NACL, 2 MM BETA-OCTYL GLUCOSIDE WITH 1 MICROLITER RESERVOIR SOLUTION (10-12% (W/V) PEG 20K, 0.1 M MES, PH 6.5) AND EQUILIBRATING AGAINST 1 ML OF RESERVOIR SOLUTION. CRYSTALS APPEARED WITHIN SEVERAL HOURS AND GREW TO A FINAL SIZE OF 0.2 X 0.2 X 0.8 MM IN ABOUT 2 DAYS. THE CRYSTALS WERE CRYO-PROTECTED IN RESERVOIR SOLUTION SUPPLEMENTED WITH 20% (V/V) ETHYLENE GLYCOL, AND THEN FLASH-COOLED IN LIQUID NITROGEN. |