Ligase/polymerase method for detecting cytosine methylation...

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving nucleic acid

Reexamination Certificate

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C536S024310, C536S024320, C536S024330

Reexamination Certificate

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10204961

ABSTRACT:
Described is a method for detecting 5-methylcytosine in genomic DNA samples. First, a genomic DNA from a DNA sample is chemically converted with a reagent, 5-methylcytosine and cytosine reacting differently, and the pretreated DNA is subsequently amplified using a polymerase and at least one primer. In the next step, the amplified genomic DNA is hybridized to at least two oligonucleotides, the latter being joined by inserting at least one oligonucleotide. In the ligation product, one nucleotide carries a detectable label, and the elongation depends on the methylation status of the specific cytosine in the genomic DNA sample. In the next step, the elongated oligonucleotides are analyzed for the presence of the label.

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