| X-RAY DIFFRACTION |
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ONE MICROLITER OF THE PROTEIN SOLUTION (LESS THAN 1 MG PER ML AND IN 50 MM SODIUM ACETATE, 100 MM NACL, PH 4) WAS CRYSTALLIZED BY ADDING ONE MICROLITER OF THE WELL SOLUTION (0.1 M HEPES PH 7.4, 0.8 M K,NA TARTRATE).HANGING DROPS AND VAPOUR DIFFUSION METHOD WAS USED AT RT. BEFORE CRYSTALLIZATION, 25 MICROLITERS OF THE PROTEIN SAMPLE WAS INCUBATED WITH 1 MICRO LITER OF BIOTIN SOLUTION (1 MG PER ML AND IN 5 MM TRIS PH 8.8, 8 MM CHES PH 9.5) FOR 3.5 HOURS AT 37 DEGREES OF CELCIUS. |
