GenScript Protein G Resin is an affinity chromatography medium designed for easy, one-step purification of classes, subclasses and fragments of immunoglobulins from biological fluids and cell culture media. Protein G Resin can also be used for immunoprecipitation of proteins,protein complexes or antigens. The recombinant protein G ligand is coupled to 4% highly cross-linked agarose. The static binding capacity of Protein G Resin is over 20 mg goat IgG/ml settled resin. The dynamic binding capacity will vary depending on several factors such as target antibody, flow rate etc.
Protein G, a bacterial cell wall protein isolated from group G Streptococci, binds to mammalian IgGs mainly through Fc regions. Native protein G has 3 IgG binding domains and also sites for albumin and cell-surface binding. The latter have been eliminated from recombinant protein G to reduce nonspecific binding. Although protein G has very similar tertiary structures to protein A, their amino acid compositions differ significantly, resulting in different binding characteristics. Protein G can be used for purification of mammalian monoclonal and polyclonal IgGs that do not bind well to protein A. Protein G has greater affinity than protein A for most mammalian IgGs, especially for certain subclasses including human IgG3, mouse IgG1 and rat IgG2a. Unlike protein A, protein G does not bind to human IgM, IgD and IgA.
Note: High temperature heating is not recommended. The agarose melts above 65°C. Key Features: Broad IgG binding spectrum; Binding specificity complements of protein A; Agarose media; No specific albumin binding; Optimized homogeneous recombinant ligand; High capacity; Available in bulk size. Store at 2-8°C, do NOT freeze.
https://www.genscript.com/kit/L00209_200-Protein_G_Resin.html