Recovery of and uses of specific binding agents

摘要

An antibody specific for a target analyte is purified by affinity chromatography on a substrate bearing a low-affinity analogue of the target analyte. The antibody is displaced from the substrate by contact with a second analogue of intermediate affinity, which remains complexed with the antibody. This complex can be used in a conventional assay for the target analyte, which displaces the intermediate-affinity analogue. The complexed antibody is rendered more storage-stable because the second analogue protects the antibody binding reagion.