Dual fidelity erca detection systems

C - Chemistry – Metallurgy – 12 – Q

Patent

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C12Q 1/68 (2006.01)

Patent

CA 2432011

The invention discloses an oligonucleotide probe which can be used for the identification of polymorphisms in a nucleic acid sequence. The probe contains an allele specific base at the 3' end of the oligonucleotide and an additional deliberate mismatch base at a position of up to 4 nucleotides from the 3' end of the probe. The oligonucleotide is particularly useful in Rolling Circle Amplification (RCA) reactions by increasing the specificity of discrimination between alleles.

La présente invention concerne une sonde oligonucléotidique pouvant être utilisée pour l'identification de polymorphismes dans une séquence nucléotidique. Cette sonde contient une base spécifique à l'allèle à l'extrémité 3' de l'oligonucléotide et une base de désappariement délibéré supplémentaire à une position située à une distance pouvant aller jusqu'à 4 nucléotides de l'extrémité 3' de la sonde. L'oligonucléotide est particulièrement utile dans des réactions RCA (amplification par cercle déroulant), car il permet d'augmenter la spécificité de la discrimination entre les allèles.

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