An Affinity Chromatography Technique for the Purification of Monoclonal Antibodies
Published: April 30, 2024
Abstract
Source: Elgundi, Z., et al. Laboratory Scale Production and Purification of a Therapeutic Antibody. J. Vis. Exp. (2017).
This video demonstrates a technique for purifying monoclonal antibodies from the culture supernatant obtained from an antibody-producing cell culture. The process involves using a matrix of crosslinked agarose beads with conjugated Protein A, which immobilizes the antibodies in the supernatant on the beads, allowing for effective separation from contaminants. By applying an elution buffer with low pH, the protein A-antibody interaction is loosened, facilitating the collection of antibody-containing fractions.
Protocol
1. Antibody Purification by Affinity Chromatography Using an Automated Fast Protein Liquid Chromatography (FPLC) System NOTE: The following procedure can generally be applied to most automated systems. Purification can be performed at room temperature or at 4 °C (if FPLC system is kept in a cool room). A series of scouting tests can be performed to identify the optimal purification conditions including appropriate column matrix, binding buffer, elution buff…
Disclosures
The authors have nothing to disclose.
Materials
| Phosphate Buffered Saline (PBS) Tablets, pH 7.4, 100 ml | 09-2051-100 | Astral Scientific | |
| HiTrap Protein A High Performance, 1 x 5 ml column | GE17-0403-01 | Sigma-Aldrich | |
| AKTApurifier 100 | 28406266 | GE Healthcare | Automated FPLC system, which can include a P-960 sample pump and Frac-920 fraction collector. |
| Glycine-HCl | G2879 | Sigma-Aldrich | |
| Citric Acid, monohydrate | BIOC2123 | Astral Scientific | |
| Sodium Citrate, trisodium salt dihydrate | BIOCB0035 | Astral Scientific | |
| 1 M Tris-HCl solution pH 9.0 | BIOSD8146 | Astral Scientific | |
| Amicon Ultra Centrifugal Filters (30 MWCO) | UFC803008/UFC903008 | Merck Millipore | Used to buffer exchange and concentrate purified protein. |
| Pierce Bicinchoninic Acid (BCA) Assay Kit | 23227 | Thermo Fisher Scientific | |
| BLItz System | 45-5000 | fortéBIO | Instrument used for bio-layer interferometry (BLI) measurements. |
| Protein A biosensors | 18-5010 | fortéBIO |
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Cite This Article
An Affinity Chromatography Technique for the Purification of Monoclonal Antibodies. J. Vis. Exp. (Pending Publication), e22107, doi: (2024).