Method for purification of target polypeptides

C - Chemistry – Metallurgy – 07 – K

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C07K 14/435 (2006.01) C07K 1/22 (2006.01)

Patent

CA 2760463

The present invention relates to a process for purification of a target molecule, comprising the steps: (a) contacting a target molecule, and a population of target binding polypeptides (TBP), in solution for a sufficient time to allow complex formation; and (b) isolating the target from the complex from (a) by subsequent purification steps, wherein (i) the target binding polypeptides have at least two binding functionalities; a first binding functionality towards the target and a second binding functionality towards a catching ligand comprised in a solid support; and (ii) the first binding functionality comprises at least two binding sites for the target, and the target com¬ prises at least two binding sites for the TBP.

La présente invention concerne un procédé de purification d'une molécule cible, comprenant les étapes consistant à : (a) mettre une molécule cible en contact avec une population de polypeptides liants cibles (TBP) dans une solution pendant une durée suffisante pour permettre la formation d'un complexe ; et (b) isoler la cible du complexe issu de (a) par des étapes de purification ultérieures, (i) les polypeptides liants cibles ayant au moins deux fonctionnalités de liaison, une première fonctionnalité de liaison envers la cible et une seconde fonctionnalité de liaison envers un ligand de capture compris dans un support solide ; et (ii) la première fonctionnalité de liaison comprenant au moins deux sites de liaison pour la cible, et la cible comprenant au moins de sites de liaison pour les TBP.

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