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    • 1. 发明公开
    • FRACTIONATION OF PROTEINS FOR PROTEOMICS
    • EP4321521A1
    • 2024-02-14
    • EP22190074.9
    • 2022-08-11
    • PreOmics GmbH
    • KULAK, Nils A
    • C07K1/14C07K1/30C07K1/36
    • The present invention relates to a method of fractionating a sample comprising proteins, polypeptides and/or peptides, said method comprising (a) performing a first change of physicochemical conditions of said sample, wherein said first change establishes precipitating conditions for said proteins, polypeptides and/or peptides, but does not establish denaturing conditions for said proteins, polypeptides and/or peptides; and (b) performing one or both of the following (i) and (ii): (i) adding solid particulate matter to said sample; and (ii) performing said method in a vessel with a rough surface; wherein steps (a) and (b) can be effected concomitantly or in any order and yield a first fraction of proteins, polypeptides and/or peptides as a first precipitate on said particulate matter and/or on said inhomogeneous surface, and a second fraction of proteins, polypeptides and/or peptides remaining in a supernatant; and (c) subjecting said first precipitate to a second change of physicochemical conditions which are capable of solubilizing a part of said first precipitate, thereby obtaining a third fraction remaining precipitated and a fourth fraction in solution.