Patent ID: 7214319

Claim:
A method of purifying the human coagulation factor IX from animal milk, at least including the following procedures: (a) stabilizing the human coagulation factor IX in transgenic animal milk while precipitating casein consisting essentially of adiusting the pH to a range between 5.0 and 6.5 using a buffer solution; (b) processing the animal milk of the certain pH value obtained from Step (a) through a ceramic filtering membrane under a flow pressure between 10 psi and 20 psi, for the purpose of separating the casein from the milk while collecting the filtered solution (c) processing the aforesaid filtered solution through polysulfone filtering membrane under a flow pressure between 10 psi and 20 psi and at a pH value of 5.0 and 6.5, for the purpose of concentrating the human coagulation factor IX while collecting the second concentrated solution and; (d) processing the aforesaid concentrated solution by chromatographic process to purify the human coagulation factor IX.