1.8.4.2 crystallized at 25°C using the hanging-drop vapour-diffusion method, crystals belong to the space group I222 or I2(1)2(1)2(1), with unit-cell parameters a = 90.59, b = 102.43, c = 128.96 A 726599 1.8.4.2 hanging-drop vapour diffusion 670699 1.8.4.2 homology modeling 743646 1.8.4.2 homology modeling.Csteine residues, Cys58 and Cys95 come in close proximity in the tertiary structure with pKa value 9. The residues are involved in the disulfide oxidoreductase catalytic activity 741551 1.8.4.2 purified recombinant enzyme MdbA, sitting drop vapor diffusion technique, a well solution containing 31.4% PEG 8000, 150 mM citrate buffer, pH 5.5 is used, 4-16 °C, 10 days, X-ray diffraction structure determination and analysis at 1.2 A, molecular replacement using the Corynebacterium diphtheriae MdbA structure (PDB ID 5C00) as the starting model 765004 1.8.4.2 to 1.77 A resolution. The structure harbors a thioredoxin-like domain and an extended alpha-helical domain 743311