Schematic illustration of the monitoring principle of the ampli-fication process by RT-LAMP using MB. Reverse transcription andDNA amplification can be accomplished at a constant temperature (63C) in a short time in one-step by the use of reverse transcriptase togetherwith Bst DNA polymerase. The electroactive reagent MB binds toamplified DNA. Hence, the peak current of reaction mixture decreaseswith the amplification because of the slow diffusion of MB-amplifiedDNA complex to the electrode surface. The peak current measured bySVW decreases with the amount of amplified DNA.
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