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Updated: Jul 3, 2026

Activated Cross-linked Agarose for the Rapid Development of Affinity Chromatography Resins - Antibody Capture as a Case Study
Published on: August 16, 2019
Affinity precipitation of proteins by polyligands
J E Morris1, A S Hoffman, R R Fisher
1Biological Process Technology Institute, University of Minnesota, St Paul, Minnesota 55108, USA.
Abstract:
A novel technique for affinity precipitation has been developed in which multimeric target proteins are precipitated as a result of network formation by polymer-conjugated ligands (polyligands). A polyligand precipitant for avidin was synthesized by conjugation of biotin to a polyacrylamide-based backbone. The effects of mixing conditions, ligand substitution frequency, and molecular weight on affinity precipitation were examined using the biotin-PAAm precipitant. Biotin was replaced by iminobiotin to study the effect of the ligand-protein dissociation constant o affinity precipitation. The iminobiotin-PAAm precipitant was also used to examine the reversibility of the precipitation and recovery of the target protein after precipitation.
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