Protein G is a bacterial cell wall protein derived from Group G Streptococci, primarily from Streptococcus pyogenes. It is commonly used in molecular biology and biochemistry research as a recombinant protein for its ability to bind to antibodies, particularly immunoglobulin G (IgG), with high affinity.
Protein G is used in various immunoassays, protein purifications, and antibody purification techniques due to its strong binding affinity to IgG from different species. It is a valuable tool for the isolation and purification of antibodies from complex biological samples.
Protein G binds to the Fc region of IgG molecules, allowing for the efficient capture and purification of antibodies. It is often used as an alternative to Protein A, another bacterial protein commonly used for antibody purification, as it can bind to a wider range of IgG subclasses and species.
Overall, Protein G is a versatile and widely used tool in the field of molecular biology and immunology for the purification and isolation of antibodies, making it a valuable reagent in research and diagnostic applications.
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