Patent ID: 7700312

Claim:
An enzyme preparation comprising a support of nanoscale size solid, water insoluble, inorganic oxide support particles with hydrophilic surfaces and having a diameter of from about 0.1-100 nm and a surface area of from about 150-500 m 2 /g, with enzyme molecules electrostatically adhered to the hydrophilic surfaces of said particles with up to about 70% of the total surface area of said particles covered by said enzyme molecules, said preparation prepared by mixing said particles with said enzyme molecules in an aqueous system under pH conditions establishing opposite charges for the particles and the enzyme molecules, respectively, and electrostatically adhering the enzyme molecules to the particles to form enzyme-coated particles, and thereafter removing virtually all of the water from the enzyme-coated particles, said water removal step selected from the group consisting of lyophilization of the enzyme-coated particles and passing a drying gas over the enzyme-coated particles.