Method for high yield purification of immune globulins from...

A - Human Necessities – 23 – J

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A23J 1/06 (2006.01) B01D 15/08 (2006.01) C07K 16/00 (2006.01) C07K 16/06 (2006.01)

Patent

CA 2463893

The method for immune serum globulin purification relates to the purification of immune globulins from blood plasma with a high degree of efficiency and a high rate of recovery. The immune globulin source is Cohn's fraction I+II+III or II+III prepared from plasma or plasma intermediates by precipitation of the paste at pH 6.7 to 6.8 in the presence of 20% ethanol and 80% purified water. A glycine extraction is followed by an anion exchange chromatography column step to achieve a significantly high yield and high purity of the concentrated protein.

L'invention concerne un procédé de purification de sérum-immuno-globulines permettant de purifier des immuno-globulines à partir de plasma sanguin à un degré élevé de rendement et à une vitesse élevée de récupération. La source d'immuno-globuline est une fraction de Cohn I+II+III ou II+III préparée à partir de plasma ou d'intermédiaires de plasma par précipitation de la pâte à un pH compris entre 6,7 et 6,8 en présence de 20 % d'éthanol et de 80 % d'eau purifiée. Une extraction de glycine est suivie d'une étape de colonne de chromatographie d'échange anionique, aux fins d'obtention d'un rendement assez élevé et d'une pureté élevée de la protéine concentrée.

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