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Guanine quenching of a fluorescence-labeled DNA probe is a powerful tool for detecting a mutation in a targeted site of a DNA strand. However, a different guanine adjacent to a targeted site can interfere with detection of a point mutation, resulting in unsatisfactory sensitivity. In the current study, we developed a simple method to improve sensitivity of the guanine quenching method using a masking...
Fluorescence quenching by guanine allows DNA hybridization to be monitored and any point mutations in oligonucleotides to be detected. However, fluorescence quenching is often affected by untargeted guanine located in a protruding end (single-strand DNA) of the probe-target DNA duplex resulting in an unsatisfactory sensitivity. In the present study, we used enzymatic digestion of the protruding end...
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