| X-RAY DIFFRACTION |
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293 |
The enzyme solution was exchanged buffer into 50 mM Tris-HCl pH 7.4 and diluted with 50 mM Tris-HCl pH 7.4, 5 mM DTT, 100 micro M oxypurinol, and 30% glycerol to a concentration of 8.6 mg/ml. The precipitant solution contained 50 mM potassium phosphate pH 6.0, 5 mM DTT, 0.2 mM EDTA, 100 micro M oxypurinol, 30% glycerol and 14%-15% PEG 4000. 10 micro L enzyme solution and 10 micro L reservoir solution were mixed on siliconized glass plates and kept in the dark at 20 C for 5 days. |
