Chhatre S, Titchener-Hooker NJ, Newcombe AR, Keshavarz-Moore E. Purification of antibodies using the synthetic affinity ligand absorbent MAbsorbent A2P.
Nat Protoc 2007;
2:1763-9. [PMID:
17641643 DOI:
10.1038/nprot.2007.253]
[Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A protocol for the purification of polyclonal antibodies from ovine serum using the synthetic protein A absorbent MAbsorbent A2P is described. Clarified serum is loaded directly onto the affinity column without prior adjustment and albumin and unwanted serum components are washed from the column using a sodium octanoate buffer before elution of bound antibodies. MAbsorbent A2P was shown to bind approximately 27 mg ml(-1) of polyclonal immunoglobulin under overloading conditions, with eluted IgG purities of >90% and minor levels of albumin (approximately 1%). The anticipated time required to complete the purification protocol is 6-7 h. Although the protocol is similar to methods utilized for antibody purification using chromatography with protein A derived from the cell wall of the microorganism Staphylococcus aureus or protein G from Streptococcus as the affinity ligands, affinity absorbents based on synthetic ligands offer a number of advantages to compounds derived from biological sources, in particular robustness, relatively low cost, ease of sanitization and, in principle, lack of biological contamination.
Collapse