Label-free detection of single nucleotide polymorphisms using surface plasmon resonance imaging

摘要

Disclosed are methods of using structure-specific, invasive nucleic acid cleavage reactions, in an addressed array format, to detect polymorphisms in general, and single nucleotide polymorphisms in particular. In the preferred embodiment of the invention, the addressed array format utilizes surface plasmon resonance imaging as a means for detecting the products of the invasive cleavage reaction and hence the presence of polymorphisms in the target nucleic acid. Sensitivity of the SPR detection is further enhanced by rolling circle amplification of the bound cleavage products.