Thermo Scientific™ POROS™ MabCapture™ A Select Resin

Catalog No.	Volume (Metric)
PI82079	5 mL
PI82080	15 mL

Catalog No. PI82079 Supplier Thermo Scientific™ Supplier No. 82079

Description

MabCapture A Select a monoclonal antibody purification resin provides high dynamic binding at low linear flow rates and maintains superior binding capacity at high linear flow rates

POROS™ MabCapture™ A Select Resin is a new high-throughput, lower-priced Protein A chromatography resin, combining past improvements to MabCapture A with our own Protein A ligand, enabling the same high-throughput purification performance at a significant reduction in price over most Protein A chromatography resins. These advances provide a monoclonal antibody purification resin that 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 linear 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 A resins
• Purify for polyclonal IgG from human, rabbit, monkey, mouse, pig, dog, or cat serum
• Clean and sanitize with standard sodium hydroxide agents used for other chromatography products
• Recognize major increases to process productivity and reduce the downstream bottleneck

The Protein A molecule contains five high-affinity binding sites capable of binding to the Fc portion of antibodies. Compared to Protein G, Protein A provides the highest binding capacity for subclasses of IgG from rabbits, pigs, dogs, and cats. Protein A also has higher binding capacity for human IgG, except for IgG3, which it binds weakly. Protein A also binds weakly to mouse IgG1 and is not recommended for most applications with that antibody isotype. The Protein A molecule also has greater stability than Protein G. Protein A is heat-stable and retains its native conformation when exposed to denaturing reagents such as 4M urea, 4M thiocyanate, and 6M guanidine hydrochloride.

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. Protein A chromatography, which is used as the primary capture chromatography step in most antibody process platforms, is generally regarded as the major process bottleneck due to the slow flow rates and long residence times required for the effective operation of conventional Protein A chromatography resin. POROS MabCapture Select chromatography resin offers 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

• Type: A Select Resin
• Standard Components: Protein A
• 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 A
• Purification Target: IgG Antibodies, Ig Antibodies
• Shipping Condition: Wet Ice

Frequently Asked Questions (FAQs)

Are POROS analytical columns compatible with HPLC systems from Waters or Agilent?

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.

For any POROS analytical column, is the column compatible with an AKTA or Avant purification system?

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.

What is the physical or mechanical stability of POROS resins?

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.

What should I do if a POROS column dries out or air is pumped onto the column?

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.

Can POROS resins be used to purify large biomolecules?

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.

What type of column do you recommend for POROS 50 µm resins? Do I need a high pressure column for POROS resins?

POROS resins are mechanically rigid and incompressible and can be packed effectively in low-pressure glass columns and in high-pressure stainless steel columns. The lack of wall support with increasing column diameter has minimal impact on chromatography performance because the beads support themselves, allowing for flexible column packing approaches and consistent and robust results. Columns can be packed with traditional flow pack, axial compression, or pack-in-place/stall pack packing methods.

What are the benefits of POROS chromatography resins in a manufacturing process?

Increased titers and product demand have caused substantial bottlenecks in downstream processing for a range of biomolecules. POROS chromatography resins address these challenges with solutions that help maintain performance and add process flexibility. Due to the polymeric nature of the backbone and the way we attach the ligands, the beads have very robust physical and chemical stability. This allows for aggressive solutions to be used, if needed, to improve cleanability and thereby increase resin lifetime/reuse. Our ion exchange resins are the go-to resins in downstream monoclonal antibody and recombinant protein chromatography where capacity, resolution, and yield are critical. We are also working on a new line of hydrophobic interaction resins that may be of interest for future projects that will be a best-in-class product for capacity and resolution with an added benefit of being able to load under lower salt concentrations and faster flow rates. We are also a strong partner when it comes to quality and supply of our products.

Safety and Handling

WARNING: Cancer - www.P65Warnings.ca.gov