Fig. 6. Anion exchange chromatography of the dialysed protein fraction from the midgut gland homogenate of C. destructor that was precipitated by ammonium sulphate at concentrations between 30 and 60% of saturation. Protein sample was loaded onto a Bio-Rad DEAE column and protein concentration (mg protein ml^–1, ) and endo-β-1,4-glucanase (•) and laminarinase () activities (µmol reducing sugars produced min^–1 ml^–1) were measured in the eluted fractions.