{HEAD ~ Any influences} on the interaction and {TAIL ~ binding} of the analyte that is free in solution in the liquid test sample to its complementary labeled reagent will be encountered in parallel in the binding between the immobilized analyte in reference region to the labeled reagent as it diffuses through the reference region 
{ HEAD ~ Any influences } on the interaction and { TAIL ~ binding } of the analyte that is free in solution in the liquid test sample to its complementary labeled reagent will be encountered in parallel in the binding between the immobilized analyte in reference region to the labeled reagent as it diffuses through the reference region
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