Fabsorbent™ F1P HF

Product overview

Fabsorbent™ F1P HF is a mixed-mode chromatography resin, that provides an alternative purification solution for the effective capture of differing antibody binding regions. Unlike expensive protein A or protein L strategies, Fabsorbent™ F1P HF uses a synthetic ligand that offers a cost-effective alternative for antibody fragment and bispecific separation.

Fragmented antibodies are smaller antibody fragments that consist of portions of the heavy and light chains, specifically one constant and one variable domain from each. Unlike full-length monoclonal antibodies (mAbs), these fragments lack the Fc (fragment crystallizable) region, which significantly reduces their size. This lack of the Fc region enhances their ability to penetrate tissues more effectively, making them especially valuable for therapeutic applications where rapid distribution and clearance are important.

The absence of an Fc-region in antibody fragments complicates their purification, where traditional methods like Protein A chromatography used for full antibodies, are not applicable. These complexities can increase development timelines, costs, and the need for specialised purification strategies, making the discovery of specific antibody-domain therapies more challenging.

Fabsorbent™ F1P HF has a unique synthetic ligand that demonstrates broad specificity for capture and purification of mAbs and their derivatives, with affinity for both kappa and lambda chains. The synthetic nature allows for robust base-stability, and the PuraBead® 6HF base matrix offers stable flow properties even for large-scale manufacturing. These attributes make it an appealing alternative to Protein L as a platform technology.

As the demand for novel antibody formats grows, efficient screening of purification conditions becomes essential. Astrea Bioseparations has a broad range of purification resins, ranging from capture to polish, for mAb and other antibody formats. Using Astrea Bioseparations' toolbox approach, products, such as Fabsorbent™ F1P HF, HCPure™, Q PuraBead^® and SP PuraBead^® Edge, provide the market with additional choices for downstream processing workflows. Resins are provided in high-throughput screening formats to streamline discovery and purification. Combining smarter purification strategies and high-throughput screening options will help shape the future of biopharmaceutical development and commercialisation of new drugs.

What are the key features of Fabsorbent™ F1P HF?

• Demonstrates broad specificity for capture and purification of antibody binding regions, with affinity for both kappa and lambda chains.
• Comparable protein recovery to traditional Protein L for kappa light chain capture.
• Operates at milder pH conditions compared to traditional Protein A or Protein L purification, reducing protein denaturing and aggregation.
• Can be cleaned/depyrogenated in 1.0 M NaOH.

Case study: Fabsorbent™ F1P HF comparison to traditional Protein L methods

Fabsorbent™ F1P HF was tested against a competitor Protein L resin in antibody fragment capture and purification, offering significant benefits in purity. In a comparison using a variable kappa light chain (Vk) fragment from E. coli as the model, Fabsorbent™ F1P HF achieved comparable Vk recovery while demonstrating higher elution purity. Key advantages include:

• Higher purity: Fabsorbent™ F1P HF shows superior purity compared to Protein L resin.
• Effective HCP clearance: Achieved a 3.67 PPM log clearance of host cell proteins (HCP), versus just 1.84 PPM with Protein L.
• Optimized conditions: Mild pH conditions (pH 5.0 for elution) for better fragment recovery without compromising product quality, reducing likelihood of protein denaturing and aggregation.

These benefits make Fabsorbent™ F1P HF an ideal choice for efficient, high-purity antibody fragment purification.

Simplified workflow integration and scalability

Fabsorbent™ F1P HF is designed for seamless integration into existing purification processes. Available in multiple column sizes for research or process-ready applications and bulk adsorbent slurry, ensuring scalability from lab-scale R&D to large-scale manufacturing.

Fabsorbent™ F1P HF is a solution trusted by industry players to ensuring safe, pure, and high-quality antibody products. It provides a powerful alternative over traditional monoclonal antibody capture and purification methods, helping manufacturers achieve efficiency, reliability, and compliance.

Product specifications

Frequently asked questions

What formats is Fabsorbent™ F1P HF available in?
Fabsorbent™ F1P HF is available in pre-packed columns ready to plug into your research or GMP process. It is also available in slurry format.

What is the recommended operational flow rate for Fabsorbent™ F1P HF?
The recommended operational flow rate is up to 500 cm/hr, depending on column size.

What is the pH stability of Fabsorbent™ F1P HF?
Fabsorbent™ F1P HF is stable in the long term (3 months) from pH 3 to pH 13. The recommended operating pH range for antibody binding applications is pH 6.0 to pH 9.0, starting with a low pH elution step (5.0 – 3.0) with scope for further optimization.

How should Fabsorbent™ F1P HF be stored?
The recommended storage condition is 2 – 30°C in 20% ethanol.

How is Fabsorbent™ F1P HF regenerated?
Removal of any residual adsorbed material can be achieved by washing the column with 1.0 M NaOH. A contact time of 1 hour will normally suffice to ensure destruction of viable organisms, although up to 5 hours contact time may be required. No less than 5 column volumes are recommended. Once cleaning with NaOH is complete, wash with at least 3 bed volumes of equilibration buffer until the pH and conductivity of the column eluate is equal to that of the buffer entering the column. Complete this process prior to further use or storage in the storage buffer.

What types of biomolecules can Fabsorbent™ F1P HF be used with?

• Binds fragmented antibodies, such as Fab, Fab’, F(ab’)2, scFv, and dAb antibody fragments
• Demonstrates broad specificity for capture and purification of antibody binding regions, with affinity for both kappa and lambda chains.