LATERAL FLOW TEST STRIP WITH MIGRATING LABEL
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United States of America Patent
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app pub date -
Mar 5, 2009
filing date -
Sep 6, 2006
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Abstract
A lateral flow test strip is disclosed that includes a path of flow from a sample receiving zone through a mobilization zone to a primary capture zone and a secondary capture zone. A mobilizable conjugate is present in the mobilization zone, and a mobilizable label is present on the test strip upstream of the conjugate. An immobilized first specific binding partner is present in the primary capture zone and an immobilized second specific binding partner is present in the secondary capture zone. The conjugate includes a primary specific binding partner for the first specific binding partner in the primary capture zone, and a secondary specific binding partner that binds the label and the second specific binding partner. Application of liquid sample to the sample receiving zone results in movement of the liquid sample along the path of flow to move the label and conjugate distally along the test device. The label binds the conjugate after the conjugate binds the analyte, the first specific binding partner or second specific binding partner, so that labeling of the conjugate is delayed.
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