Disclosed are methods, kits, and compositions for the highly sensitive detection of molecules. The methods, kits, and compositions are useful in determining concentrations of molecules in samples to levels of 1 femtomolar, 1 attomolar, or lower. The methods, kits, and compositions also allow the determination of concentration over a wide range, e.g., 7-log range, without need for sample dilution.

 
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< Alkene piperidine derivatives as antiviral agents

> Antibodies to peptide fragments having cell death-inhibitory activity

> Cyclic derivatives as modulators of chemokine receptor activity

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