2.2. Enzyme immobilization
Foroneenzymereactor,50unitsofactiveproteinwereimmobi-lized on 40mg of the carrier material Eupergit® C 250L. The carrier material with the immobilized enzyme was then filled into a poly-carbonate cartridge and sealed at both sides with a porous HDPE plate. When not in use, the enzyme reactor was stored at 4◦C in carbonate buffer (B).