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© Research
Publication : Analytical biochemistry

A radioimmunoassay-based method for measuring the true affinity of a monoclonal antibody with trace amounts of radioactive antigen: illustration with the products of a cell-free protein synthesis system

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Analytical biochemistry - 01 May 1993

Friguet B, Fedorov A, Serganov AA, Navon A, Goldberg ME

Link to Pubmed [PMID] – 8512069

Anal. Biochem. 1993 May;210(2):344-50

This communication describes a novel highly sensitive method for measuring the affinity of a monoclonal antibody for its antigen. It is based on a radioimmunoassay in which the antigen is labeled with radioactivity. It is therefore particularly well adapted to the study of trace amounts of radiolabeled polypeptide chains produced either in vivo, or in vitro by a cell free protein synthesis system or by chemical radiolabeling. It offers several advantages over previously described methods. Though making use of insolubilized antibody, it does measure the true affinity constant of the monoclonal antibody in solution for the antigen. It can be used even when the antigen is present at concentrations far below the dissociation constant of the antibody/antigen complex. It does not require the antigen or the antibody to be purified. In most cases, it requires no sophisticated equipment. This method could be easily adapted to the determination of the equilibrium constant of any type of protein/ligand system.

https://www.ncbi.nlm.nih.gov/pubmed/8512069