A fok l/DNA machine that duplicates its analyte gene sequence

A tailored nucleic acid that includes a recognition sequence for the analyzed gene and a hybridized sequence of the gene itself acting as the fuel substrate of the machine. Upon recognition of the gene by the fuel substrate, the autonomous Fok I-induced cleavage of the resulting duplex proceeds, resulting in the duplication of the gene sequence and the horseradish peroxidase mimicking hemin/G-quadroplex DNAzyme as a chemiluminescence reporter. The autonomous duplication of the gene sequence and the catalytic activity of the DNAzyme provide a double amplification path that enables the analysis of target DNA with a detection limit of 1 × 10-14 M.