| X-RAY DIFFRACTION |
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CRYSTALLIZATION EXPERIMENTS WERE PERFORMED AT ROOM TEMPERATURE BY THE HANGING-DROP AND SITTING-DROP METHODS. THIN PLATE-LIKE CRYSTALS WERE OBTAINED IN 100 MM NA CITRATE PH 6.5, 13% PEG 6000. FOR DATA COLLECTION CRYSTALS WERE TRANSFERRED TO A STABILIZING SOLUTION (20 MM TRIS PH 8.0, 50 MM NACITRATE PH 6.5, 100 MM NACL, 5% GLYCEROL, 1 MM TCEP, 1 MICROM CACL2, 25% PEG6000), THEN TRANSFERRED FOR 2 MIN TO A CRYOPROTECTANT SOLUTION (20 MM TRIS PH 8.0, 50 MM NACITRATE PH 6.5, 100 MM NACL, 20% GLYCEROL, 1 MM TCEP, 1 MICROM CACL2, 35% PEG6000) AND FINALLY PLACED DIRECTLY INTO LIQUID NITROGEN. |
