Crystallization and preliminary crystallographic study of cytochrome cd sub(1) nitrite reductase from Thiosphaera pantotropha

Single crystals of cytochrome cd sub(1) nitrite reductase from Thiosphaera pantotropha) have been grown in the presence of ammonium sulphate by vapour diffusion techniques. Crystals are suitable for X-ray analysis and diffract to d sub(min) = 1.5 angstrom. They belong to space group P2 sub(1) with unit cell dimensions of a = 107.8 angstrom, b = 61.9 angstrom, c = 101.2 angstrom, beta = 112.5 degree . The crystallographic asymmetric unit contains a dimer.