1.6.3.4 | crystals of this protein are grown by sitting-drop variant of the vapour-diffusion method at 20°C in the presence of 34% polyethylene glycol monomethyl ether 2000, 0.1 M sodium acetate and 0.2 M ammonium sulfate at pH 5.4. They belong to the tetragonal space group P4(3)2(1)2, with unit-cell parameters a = 74.8, b = 95.7, c = 116.9 A, alpha = gamma = 90°, beta = 103.8°. The diffraction limit is 4.0 A |