PureProteome 0.3µm Carboxy FlexiBind Magnetic Bead System

Purification of recombinant proteins expressed in E.coli requires many time-consuming steps. To liberate the protein of interest, traditional bacterial lysis relies on the addition of lysozyme and a combination of sonication and repeated freeze/thaw cycles to break the bacterial cell wall. Disruption of the cell is accompanied by an increase in the viscosity of the suspension, due to the release of DNA. An endonuclease is added to digest the DNA, thus reducing the viscosity of the lysate. Finally, to render the lysate compatible with traditional purification methods, insoluble cell debris must be removed by centrifugation.

Immunoprecipitation (IP) is a powerful technique for proteomic screening, biomarker discovery, and signaling network elucidation. It is frequently used to enrich target proteins from complex samples such as cell lysates or extracts. Traditional IP protocols use Protein A, Protein G or a mixture of Protein A and G coupled to a solid support resin, such as agarose beads, to capture an antigen/antibody complex in solution. As the number of samples increase, the traditional, manual IP method can be time-consuming. Processing of multiple IP reactions in parallel can introduce complexity, variability and pipetting errors, which may affect reproducibility.