1.14.13.114 | purified recombinant His-tagged selenomethionine-labeled enzyme, hanging drop vapor diffusion method, mixing of 0.0015 ml of protein solution with 0.0015 ml of reservoir solution containing 0.1 M Tris-HCl, pH 7.7-8.3, 27-30% PEG 4000, and 0.2 M magnesium chloride hexahydrate, 18°C, 2-3 days, method optimization, X-ray diffraction structure determination and analysis using SAD phasing at 2.1 A resolution |