1.4.1.7 | purified His-tagged recombinant protein PA0743 alone or in complex with cofactor NAD+, hanging drop vapor diffusion method, mixing of 0.002 ml protein solution with 0.002 ml reservoir solution containing 4 M ammonium acetate and 0.1 M sodium acetate, at pH 5.4, 1 week, soaking of crystals in 10 mM NAD+ solution for complexcystals, X-ray diffraction structure determination and analysis at 2.2 A resolution |