| X-RAY DIFFRACTION |
7.5 |
277 |
CRYSTALS WERE PREPARED AT 277 K FROM THE DROPLET MIXTURE OF A 20 MG/ML PROTEIN SOLUTION CONTAINING 7 MM TRI-N-ACETYLCHITOTRIOSE (NAG3) AND 50 MM ACETATE BUFFER PH 4.2 WITH EQUAL VOLUME OF A RESERVOIR SOLUTION CONTAINING 2.0 M AMMONIUM FORMATE AND 100 MM N-(2-HYDROXYETHYL)PIPERAZINE-N'-(2-ETHANESULFONIC ACID) (HEPES) BUFFER PH 7.5. PRIOR TO THE DIFFRACTION DATA COLLECTION, THE CRYSTAL WAS SOAKED IN A CRYOPROTECTANT SOLUTION CONTAINING 30 % (W/V) POLYETHYLENE GLYCOL 20,000, 2.2 M AMMONIUM FORMATE, 100 MM HEPES BUFFER PH 7.5, AND 7 MM NAG3 FOR 2 MINUTES AT 277 K. |
