1.2.1.7 | purified recombinant enzyme in complex with NADP+ and NADP+/benzoate, sitting drop vapour diffusion method, mixing of 10 mg/ml protein in 100 mM HEPES, 100 mM KCl, 2 mM DTT, 2 mM NADP+, pH 7.5, and 1 mM benzoate (for the complex cyrstals), with crystallization solution containing 2.0 M ammonium sulfate and 5% v/v isopropanol, 5-7 days, X-ray diffraction structure determination and analysis at 2.28 A resolution |