1.13.12.16 | purified recombinant His-tagged enzyme, vapor diffusion hanging drop method at room temperature, 0.002 ml of 14 mg/ml protein in 50 mM Tris-Cl, pH 8.0, 100 mM NaCl, 20 mM 2-nitropropane, with 0.002 ml of reservoir solution containing 14% w/v PEG 5000 monomethylether and 0.1 M Na-HEPES, pH 7.0, and equilibration against 1 ml of reservoir solution, 7-10 days, X-ray diffraction structure determination and analysis at 1.44 A resolution, molecular replacement |