Crystallization and preliminary X-ray diffraction analysis of glutathione peroxidase from human plasma.
The extracellular form of glutathione peroxidase from human plasma has been crystallized by the sitting-drop vapour-diffusion method. The crystals belong to tetragonal space group I4(1) with cell dimensions of a = b = 83.1 and c = 131.0 A. They diffract beyond 2.9 A resolution and have one dimer in the asymmetric unit. A self-rotation function analysis shows the possible (222) symmetry for the tetramers of this enzyme.