CRYSTALLIZATION AND PRELIMINARY-X-RAY DIFFRACTION ANALYSIS OF THE CATALYTIC DOMAIN OF CEX, AN EXO-BETA-1,4-GLUCANASE AND BETA-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 P41212 or P43212 and have cell constants: a = b = 88.21 A ̊, c = 81.10 A ̊; α = β = γ = 90 °. © 1992.