WorkBeads™ affimAb resin is an optimized alkali-stable resin designed for purification of monoclonal- and polyclonal antibodies in laboratory to process scale. This resin has a superior base matrix in combination with an optimized alkali-stable protein A ligand. This results in high dynamic binding capacity also at short residence times, and stable capacity over multiple purification cycles with cleaning-in-place using 0.5 M NaOH.
For small scale purifications and initial screening in process development convenient pre-packed BabyBio affimAb 1 ml and 5 ml columns are available. WorkBeads affimAb resin can also be used for purifications in other formats, such as batch and centrifugation purifications.
WorkBeads are agarose based chromatographic resins manufactured by a proprietary method that results in porous beads with a tight size distribution and very high mechanical stability. Agarose based matrices have been successfully used for decades in biotechnology research from laboratory to production scale, due to their exceptional compatibility with biomolecules including proteins, peptides, nucleic acids and carbohydrates. WorkBeads resins are designed for separations requiring optimal capacity and purity.
The alkali stable recombinant protein A attached to the optimized basematrix is produced in E. coli under conditions free of components of animal origin and purified to high purity before coupling. This combination gives both high dynamic binding capacities for antibodies and the possibility for efficient cleaning-in-place with 0.5 M NaOH.
Characteristics of WorkBeads affimAb
Antibodies (IgG), bound via the Fc-region
|Matrix||Rigid, highly cross-linked agarose|
|Average particle size¹ (Dv₅₀)||50 µm|
Recombinant protein A expressed in E. coli using animal-free medium
Dynamic binding capacity² (DBC)
> 40 mg human lgG/ml resin
Max recommended flow rate³
Compatible With all standard aqueous buffers used for
protein purification. Should not be stored at ow pH for
|pH stability||3 – 10|
|Cleaning-in-place stability||Up to 0.5 M NaOH|
|Storage||2 to 8°C in 20 % ethanol|
¹The median particle size of the cumulative volume distribution.
². DBC was determined at 10% breakthrough (QB104) by frontal analysis with 1 mg/ml human polyclonal lgG in PBS, pH 7,4 AT 1,4 ml/min (245 cm/h. 2.5 minutes residence time)
³. Max recommended flow rate at 20°C using acqueous buffers. Decrease the max flow rate if the liquid has a higher viscosity. Higher viscosities can be caused by low temperature (use half of the max flow rate when operating at 4°C), or by additives (e.g., use half of the max flow rate for 20% ethanol)