Abstract
With the help of the interaction mode of capture probe-target-signal probe (CP-T-SP), an electrochemical sensing method based on the synergism strategy of dual-hybridized signaling probes modified with 6 MB (methylene blue), background suppression and large surface area Au electrode is developed for the detection of Streptococcus pneumoniae (S. pneumoniae) Lyt-1 gene sequence. The proposed sensor features a very low detection limit (LOD) of ∼0.5 fM for the target. This method also exhibits highly versatility and can apply to the construction of other sensors for the analysis of similar designated pathogenic bacteria gene sequence (PBGS).
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