1.13.12.22 | sitting drop or hanging-drop vapour-diffusion method, the enzyme is crystallized in space group P2(1)2(1)2, with unit-cell parameters a = 58.8, b = 114.1, c = 49.5 A, the crystals diffract to 2.4 A resolution. The selenomethionine-substituted mutant F40M/L89M crystallizes in the same space group as the native enzyme |