This protocol describes immunoprecipitation of proteins associated with FLAG-tagged recombinant proteins followed by mass spectrometry-based proteomics to identify the associated interactome components. FLAG epitope was chosen, because existing high-affinity monoclonal antibodies allow for sensitive immunoprecipitation and FLAG peptides permit efficient elution of protein complexes. With many commercially available FLAG tools, this protocol is highly versatile. This procedure reduces immunop…
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