Epitope Tagging of Recombinant Proteins Protocol Protocols for detection and purification of proteins tagged with a particular epitope, the FLAG tag, although the same general approach can be applied to other epitope tags. The protocols employ the anti-FLAG M2 antibody to detect and purify FLAG-tagged proteins. The methods presented are immunoprecipitation of FLAG fusion proteins from cells using an anti-FLAG M2 affinity gel, detection of FLAG fusion proteins by western blotting, and purification of FLAG fusion proteins by anti-FLAG.
Immunoprecipitation of mRNA-Protein Complexes Protocol Protocol for immunoprecipitation of mRNA-protein complexes. In this protocol, an antibody targeting an RBP of interest is used to immunoprecipitate the RBP and any interacting
molecules from a cell lysate. Reverse transcription followed by PCR is then used to identify individual mRNAs isolated with the RBP. This method focuses on examining an association between a specific RBP-mRNA complex, and it is best suited for a small scale screening of known or putative binding partners.
Immunoprecipitation: Denaturing Lysis Protocol For many sources of antigens, one useful method of lysis is to treat cells with harsh, denaturing solutions to release most of the protein antigens, as described here. The lysates are then diluted to reduce the denaturing conditions to levels that are suitable for the formation of antibody-antigen complexes. The resulting solution is precleared prior to immunoprecipitation.
Protocol Immunoprecipitation Immunoprecopitation method, the protein from the cell or tissue homogenate is precipitated in an appropriate lysis buffer by means of an immune complex which includes the antigen (protein), primary antibody and Protein A-, G-, or L-agarose conjugate or a secondary antibody-agarose conjugate