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Description
POROS™ MabCapture™ G Select Resin is a high-throughput, lower-priced Protein G chromatography resin manufactured using our own Protein G ligand to enable high-throughput purification performance. It is used in a variety of antibody affinity purification methods and is ideal for polyclonal IgG purification from mouse, human, cow, goat, and sheep serum, including human IgG3 and mouse IgG1 isotypes. POROS MabCapture G Select Resin demonstrates high dynamic binding performance at low linear flow rates and maintains superior binding capacity at high linear flow rates where other chromatography media products cannot operate.
- Maintain high dynamic binding capacity at liner flow rates over 700 cm/hr
- Design processes with greater flexibility (shorter bed heights, faster flow rates, or both) due to the improvements made to the antibody binding efficiency
- Obtain the highest dynamic binding capacity for antibodies vs. conventional agarose- or silica-based Protein G resins
- Purify polyclonal IgG from mouse, human, cow, goat, and sheep serum, including human IgG3 and mouse IgG1 isotypes
- Sanitize and depyrogenate with standard agents used for other chromatography products
- Recognize major increases to process productivity and reduce the downstream bottleneck
Protein G is a bacterial cell wall protein isolated from group G Streptococci. Recombinant Protein G has been modified to eliminate its binding to albumin. The Protein G molecule contains two binding domains. Although the tertiary structures of Protein A and Protein G are very similar, their amino acid compositions differ significantly, resulting in different binding characteristics. 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.
The development of humanized monoclonal antibodies has continued to fuel the growth of the biotherapeutic market. Addressing the therapeutic demand for monoclonal antibodies has led to major improvements to the cell-based expression systems that are used to manufacture these proteins. Consequently, these improvements have moved the processing bottleneck from upstream cell expression to downstream purification. The introduction of POROS MabCapture G Select chromatography resin was aimed at cracking open the downstream bottleneck and providing the capacity, efficiency, and flexibility needed to make improvements to the downstream purification platform, resulting in major increases to process productivity and antibody manufacturing.
Specifications
Specifications
| Type | G Select Resin |
| Standard Components | Protein G |
| For Use With (Application) | IgG Purification |
| Volume (Metric) | 5 mL |
| Content And Storage | Store in refrigerator (2–8°C). |
| Product Line | POROS |
| Format | Poros Bead |
| Stationary Phase | Protein G |
| Purification Target | IgG Antibodies, Ig Antibodies |
| Shipping Condition | Wet Ice |
Frequently Asked Questions (FAQs)
All of the pre-packed POROS columns, regardless of column size or resin, have the same 10-32 female fittings on the column. Columns are compatible with Waters and Agilent HPLC systems. You will need 1/16 inch male fittings for the HPLC to attach the column.
All of the pre-packed columns, regardless column size or resin, have the same 10-32 female fittings on the column. They are all compatible with the AKTA instrument platform, however due to the column volume of the 2.1 mmD x 30 mmL columns (0.1 mL), these will not perform well in AKTA or Avant purification systems due to the relative size of the hold- up volume in these systems. The smallest column (PEEK or SS) that could feasibly be used in these systems is the 4.6mmD x 50mmL (0.8 mL) format.
The physical stability of POROS resins is high. Customers have agitated, with overhead mixing and or bottom gassing for long periods of time (5-10 hours) and have performed hundreds of diaphragm pump passes during stall packs. Keep in mind that agitation with any device that creates grinding and sheer, such as with a magnetic stir bar, is not recommended for any type of resin.
POROS resins rehydrate quite well. Here is the procedure that we recommend:
1. Flow 5% ethanol over the column at ?350 cm/hour for 3 CVs, followed by water or 0.1 M sodium chloride at 300 cm/hour for 3 CVs.
2. If baseline noise is still present, flow 20% ethanol over the column at 300 cm/hour for 3 CVs, followed by water or 0.1 M sodium chloride at 300 cm/hour for 3 CVs.
3. If you have established column qualification tests and specifications, perform the tests after rewetting.
In general POROS resins have behaved better for large biomolecules such as viral particles, fusion proteins, and globular proteins, where shape (not size) matters due to its unique pore structure and large pore structure as compared to traditional resins. As the target molecule size increases, capacities obtained will decrease. The large pore structure of POROS resins, which allows for convective flow (and therefore enhanced diffusion) is especially well suited for the purification of large biomolecules. POROS resins offer the best blend of high capacity (associated with chromatography beads) and improved chromatography efficiency (typically associated with monoliths or membranes). The average pore size for POROS resins is 1,000-3,600 Angstrom (100-360 nm) depending on the base bead/chemistry being utilized. For example, the molecular weight of IgG is 150 kDa and the molecular radius is 55 Angstrom. The molecular weight of IgM is ~900 kDa (pentamer), and the molecular radius is 120 Angstrom. So both of these biomolecules can interact with the pore structure associated with POROS materials.
For Research Use Only. Not for use in diagnostic procedures.
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