Inventors:
Annemarie H. Ralston - Bethesda MD, US
Billy L. Kolen - Springdale MD, US
David John Hammond - Laytonsvile MD, US
Assignee:
American National Red Cross - Washington DC
International Classification:
C07K 1/14
C07K 1/18
C07K 1/22
Abstract:
The present invention provides a method for purifying butyrylcholinesterase from various biological fluids. Biological fluids include, e. g. , blood, blood fractions, plasma, and bioreactor broths, and other such mixtures containing butyrylcholinesterase. In one embodiment, the invention provides a method for the production of purified, virally inactivated butyrylcholinesterase by contacting a biological fluid containing butyrylcholinesterase with a cationic exchange chromatography material, with an affinity chromatography material, and treating the fluid with solvent detergent. The resulting purified butyrylcholinesterase can also be subjected to a pasteurization step, and formulated in a sodium chloride/sodium phosphate solution for storage or lyophilization.