“…THE PAST DECADE has marked the development of numerous techniques for immobilizing enzymes. Both crude and purified preparations have been immobilized to a wide variety of carriers including: polyacrylamide gels (Wieland et al, 1966), starch gels (Bauman et al, 1967), celluloses (May et al, 1968), ethylene-maleic anhydride copolymer (Zingaro and Uziel, 1970), polystrene derivatives (Brown et al, 1968), porous glass (Weetal, 1969), nickel oxide (Weetal and Hersh, 1970), nylon (Hornby and Filippusson, 1970) and collagen (Silman et al, 1966). Each of the above carriers has one or more limitations.…”