5.3.2.3 | crystallization of wild-type and selenomethionine-labeled FdtA, crystallization of the mutant proteins (H49N, H51N, H49N/H51N), hanging-drop method of vapor diffusion, crystallization trials are conducted at both 25°C and 4°C. Three-dimensional structure of this sugar isomerase complexed with dTDP and solved to 1.5 A resolution. Crystals belong to the space group P4(1)2(1)2 with unit cell dimensions of a = b = 62.7 A and c = 201.3 A and one dimer per asymmetric unit |