| 摘要 |
2110050 9221772 PCTABS00017 The present invention includes novel assays employing a capture reagent, involving a first binding member conjugated to a polymeric anion such as carboxymethylamylose, and a solid phase material containing a reaction site comprising a polymeric cation substance. A test sample suspected of containing the analyte of interest may be contacted with the capture reagent to form a charged capture reagent/analyte complex. The complex is then contacted to the oppositely charged solid phase to attract, attach, and immobilize the capture reagent/analyte complex. The use of carboxymethylamylose to prepare a suitably charged capture reagent provides a superior capture reagent that is capable of binding and retaining the analyte on the solid phase even in the presence of polyanionic non-specific binding blockers.
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