Protein G Resin Filler & Bead Features and Benefits

Protein G is an immunoglobulin binding protein expressed in Group C and Group G Streptococcus bacteria, although very similar to Protein A, but with different binding specificities. It is a 65 kDa (G148 protein G) and 58 kDa (C40 protein G) cell surface protein, which is purified by binding to the Fab and Fc regions. The natural molecule Protein G also binds to albumin, but since serum albumin is a major contaminant of antibodies, the recombinant form Protein G has been genetically engineered to remove albumin binding sites.

Protein G products for antibody purification

The PurKineTM Protein G purification system is highly efficient for the purification of mammalian serum or other liquid-derived IgG. Protein G can purify monoclonal or polyclonal IgGs that are not efficiently bound to Protein A. For most mammalian IgGs, protein G has a stronger affinity than protein A, particularly for certain subclasses, including human IgG3, mouse IgGl and rat IgG2a. Unlike protein A, protein G does not bind human IgM, IgD and IgA. PurKineTM Protein G Purified Fillers are also available in pre-packed columns and kits for added convenience. In addition, Abbkine also offers products in the form of agarose gel resin fillers and magnetic beads.

Features and advantages

1. High capacity - more than 30 mg of human lgG per mL of resin.

2. High Performance - Native Protein G has three IgG binding domains and has also eliminated the site of albumin and cell surface binding from recombinant protein G to reduce non-specific binding.

3. Cost Effectiveness - Performance degradation after repeated use of the same batch of resin for at least five times.

4. Flexible - multiple formats including bulk resin, spin columns and kits.

We offer tools for the purification of monoclonal and polyclonal antibodies from different sources. The basis for antibody affinity purification is the high affinity and specificity of protein G and protein A for the Fc region of different species of IgG. We offer chromatographic media with protein G and protein A immobilized in a number of different matrices to provide an excellent method for isolating IgG and IgG subclasses from ascites, cell culture supernatants and serum. We also provide chromatographic media with recombinant protein L ligands for purification of antibodies and antibody fragments. Protein L has a strong affinity for the variable region of the kappa light chain and can be widely used to capture antibody fragments such as Fab fragments, single-chain variable region fragments (scFv) and binding domain antibodies (Dabs).

Abbkine is committed to providing the latest products and technologies for life science research and medical development worldwide. Abbkine designs, develops, manufactures and markets a unique range of products, including antibodies, research reagents, and cell functional analysis products and protein purification products for life science research. Their products provide effective solutions to the challenges of scientific research, saving time and increasing research efficiency for scientists around the world. As the general agent of Abbkine in China, Aijiejie Technology Co., Ltd., with its rich professional experience, will continue to provide Abbkine quality products and technical services to customers in China.

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