X-RAY DIFFRACTION |
4.7 |
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CRYSTALLISATION TOOK PLACE AS A GROUND CONTROL TO HEWL CRYSTALLISATION IN THE EUROPEAN SPACE AGENCY (ESA) ADVANCED PROTEIN CRYSTALLISATION FACILITY (APCF) ONBOARD THE NASA SPACE SHUTTLE'S LIFE AND MICROGRAVITY SPACELAB (LMS) MISSION (STS-78). A SOLUTION OF 21 MG OF HEN EGG WHITE LYSOZYME (3 X CRYSTALLIZED, DIALYSED AND LYOPHILIZED POWDER OF CHICKEN EGG WHITE LYSOZYME SUPPLIED BY SIGMA, L-6876 BATCH NUMBER, LOT 53H7145) DISSOLVED IN 250 UL 0.04 M ACETATE BUFFER (PH 4.7) WAS USED TO FILL THE PROTEIN CHAMBER (188 UL). THE SALT CHAMBERS (541 UL) WERE FILLED WITH 1.35 M NACL AND THE BUFFER CHAMBER (59 UL) WITH 0.04 M ACETATE BUFFER (PH 4.7). SODIUM AZIDE WAS ALSO ADDED TO THE PROTEIN AND BUFFER SOLUTION AS AN ANTI-FUNGAL AGENT (1.92 MG PER 188 UL). CRYSTALLISATION TOOK PLACE AT 20+/-1 C. |