Nucleic acid detection assay

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing compound containing saccharide radical

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C536S024300

Reexamination Certificate

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07846693

ABSTRACT:
A method for determining the methylation status of a potential methylation site in genomic nucleic acid comprising treating genomic nucleic acid with an agent which modifies cytosine bases but does not modify 5methyl-cytosine bases under conditions to form a. modified nucleic acid template containing a potential methylation site; providing a first clamp containing a first capture sequence complementary to a region flanking one side of the potential methylation site in the modified nucleic acid template, providing a second clamp containing a second capture sequence complementary to a region flanking the other side of the potential methylation site in the modified nucleic acid template; allowing the first clamp and the second clamp to hybridise to the modified nucleic acid template; ligating the hybridised first and second clamps to form a probe spanning the potential methylation site in the modified nucleic acid template; digesting the modified nucleic acid template to obtain the probe; and detecting the probe and determining the methylation status of the potential methylation site in the modified genomic nucleic acid.

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