A method for sequencing a population of nucleic acids, which includes (a) binding the population of nucleic acids with a fractionally labeled mixture of nucleotides, thereby forming a fractionally labeled population of nucleic acids, wherein the mixture includes nucleotide cognates for a common base type in the templates, and wherein a fraction of the nucleotide cognates for the common base type in the mixture are exogenously labeled nucleotides that produce a signal that is not produced by other nucleotide cognates for the common base type in the mixture; (b) detecting the signal from the fractionally labeled population of nucleic acids; and (c) repeating (a) and (b) using a second mixture of the fractionally labeled nucleotides, wherein the fraction of the exogenously labeled nucleotides is higher in the second mixture.

A method for sequencing a population of nucleic acids, which includes (a) binding the population of nucleic acids with a fractionally labeled mixture of nucleotides, thereby forming a fractionally labeled population of nucleic acids, wherein the mixture includes nucleotide cognates for a common base type in the templates, and wherein a fraction of the nucleotide cognates for the common base type in the mixture are exogenously labeled nucleotides that produce a signal that is not produced by other nucleotide cognates for the common base type in the mixture; (b) detecting the signal from the fractionally labeled population of nucleic acids; and (c) repeating (a) and (b) using a second mixture of the fractionally labeled nucleotides, wherein the fraction of the exogenously labeled nucleotides is higher in the second mixture.

A molecular fingerprinting method is disclosed to detect and genotype pathogens DNA targets in a sample through polymerase chain reaction (PCR). The method comprises performing PCR amplification and then a High Resolution Melting (HRM) analysis. The PCR reaction mixture used comprises two or more pairs of amplification primers designed in order to generate amplicons with a different melting temperature each other in order to discriminate, in the HRM analysis, each amplicon by observing the specific melting temperature of each amplicon. The method further comprises monitoring, during the HRM analysis, the change in the signal emission resulting from the temperature-induced denaturation of the double-stranded amplicons into two single-stranded DNAs, due to the release of the intercalating molecule or compound. Discrimination and genotyping of different strains of the same pathogen, different pathogens belonging to separated genus and genetic variations in the sample can be determined through a reader analysing the signal variation; the result of the analysis is obtained through a graphic interface connected to the reader.