RECOMBINANT VITAMIN K DEPENDENT PROTEINS WITH HIGH SIALIC ACID CONTENT AND METHODS OF PREPARING SAME

摘要

Methods of isolating highly sialylated recombinant vitamin K dependent proteins, particularly Factor IX, by chromatographic methods are described. The highly sialylated recombinant proteins are characterized. The improved Factor IX has at least 62% N- glycosylation with 3 or 4 sialic acid residues and improved bioavailability and pharmokinetic properties.