| X-RAY DIFFRACTION |
7.5 |
292 |
2% PEG 400,
2 M AMMONIUM SULFATE,
0.1 M NA HEPES.
A PROTEIN SAMPLE, LYOPHILIZED AFTER HPLC PURIFICATION FROM TFA/ACETONITRILE
MIXTURE, WAS DISSOLVED IN WATER TO A CONCENTRATION OF 9 MG/2 UL DROPS
OF THE PROTEIN SOLUTION WERE MIXED WITH 2 UL OF RESERVOIR SOLUTION CONTAINING 2% PEG 400, 2 M
AMMONIUM SULFATE AND 0.1 M NA HEPES, PH 7.5. THE HANGING DROPLETS WERE
EQUILIBRATED AT 19 DEG C THROUGH THE GAS PHASE WITH THE RESERVOIR.
PRISMATIC CRYSTALS MEASURING UP TO 0.4 MM GREW WITHIN 12 HOURS. FOR LOW-TEMPERATURE
DATA COLLECTION (100 K), THE CRYSTAL WAS CRYOPROTECTED IN THE RESERVOIR SOLUTION
SUPPLEMENTED BY 30 % ETHYLENE GLYCOL., VAPOR DIFFUSION, HANGING DROP, temperature 292K |
