The sequence-specific end labeling of oligonucleotides (SSELO) is an alternative labelling approach for the short-oligonucleotide diagnostic microarrays that was firstly described by Rudi and coworkers (ScientificWorldJournal 3:578–584, 2003). SSELO approach is unique in a way that it shifts the specificity determining step from hybridization to labeling, ensuring both high specificity (with careful probe design even single nucleotide polymorphisms (SNPs) can be detected) and sensitivity (detection sensitivity in the range of 0.1% relative abundance has been demonstrated) of the diagnostic system. These features make SSELO approach a perfect choice for the development of microbial diagnostic microarrays, in particular in the frame of foodborne bacterial pathogen detection.
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