| X-RAY DIFFRACTION |
8.5 |
277 |
Mix purified dimer protein at 5 mg/ml in 25 mM TRIS.Cl, pH 8.5, 10 mM NaCl, 5 mM DTT with an equal volume of the precipitant solution, 100 mM TRIS.Cl, pH 8.5, 200 mM Na.acetate, 7.5 % PEG 4,000, then suspend over 1 ml of precipitant solution. Wedge shaped crystals grew to approximately 0.1 mm on a side after a period of two weeks. Crystals were frozen by first transferring them, in four sequential steps, to a solution of 100 mM TRIS.Cl, pH 8.5, 200 mM Na.acetate, 15 % PEG 4,000. This was followed by transfer in six sequential steps to a solution containing 100 mM TRIS.Cl, pH 8.5, 200 mM Na.acetate, 15 % PEG 4,000, 30% glucose |
