Crystallization and preliminary X-ray diffraction analysis of the catalytic domain of Cex, an exo-β-1,4-glucanase and β-1,4-xylanase from the bacterium Cellulomonas fimi

Single crystals of the catalytic domain of Cex, an exo-β-1,4-glucanase and β-1,4-xylanase from the cellulolytic bacterium Cellulomonas fimi, have been grown in the presence of polyethylene glycol 4000 using the vapour diffusion technique. The crystals, which diffract to better than 2.0 Å resolution, belong to space group P4 12 12 or P4 32 12 and have cell constants: a = b = 88.21 A ̊ , c = 81.10 A ̊ ; α = β = γ = 90 °.