2.7.1.22 | hanging drop vapor diffusion, 10 mg/ml protein in 100 mM Hepes, pH 7.2, 300 mM NaCl, 1 mM dithiothreitol are incubated with 3 mM NAD and 3 mM ATP and mixed with an equal volume of the reservoir solution consisting of 100 mM MES, pH 6.0, 1 M ammonium sulfate, crystal structure of enzyme complexed with NAD |