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- Title
COBRA: a sensitive and quantitative DNA methylation assay.
- Authors
Xiong, Z; Laird, P W
- Abstract
We report here on a quantitative technique called COBRA to determine DNA methylation levels at specific gene loci in small amounts of genomic DNA. Restriction enzyme digestion is used to reveal methylation-dependent sequence differences in PCR products of sodium bisulfite-treated DNA as described previously. We show that methylation levels in the original DNA sample are represented by the relative amounts of digested and undigested PCR product in a linearly quantitative fashion across a wide spectrum of DNA methylation levels. In addition, we show that this technique can be reliably applied to DNA obtained from microdissected paraffin-embedded tissue samples. COBRA thus combines the powerful features of ease of use, quantitative accuracy, and compatibility with paraffin sections.
- Publication
Nucleic acids research, 1997, Vol 25, Issue 12, p2532
- ISSN
0305-1048
- Publication type
Journal Article
- DOI
10.1093/nar/25.12.2532