Abstract
An ultrasensitive fluorescence assay for nicotinamide adenine dinucleotide (NAD(+)) was developed by target-triggered ligation-rolling circle amplification (L-RCA). This novel approach can detect as low as 1 pM NAD(+), much lower than those of previously reported biosensors, and exhibits high discrimination ability even against 200 times excess of NAD(+) analogs.
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