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DNA methylation can be detected by the following assays currently used in scientific research: [101] Mass spectrometry is a very sensitive and reliable analytical method to detect DNA methylation. MS, in general, is however not informative about the sequence context of the methylation, thus limited in studying the function of this DNA modification.
Figure 4: Methylation-specific PCR is a sensitive method to discriminately amplify and detect a methylated region of interest using methylated-specific primers on bisulfite-converted genomic DNA. Such primers will anneal only to sequences that are methylated, and thus containing 5-methylcytosines that are resistant to conversion by bisulfite ...
The first few steps of COBRA, and the molecular changes caused by each step to methylated and unmethylated CpG sites. Combined Bisulfite Restriction Analysis (or COBRA) is a molecular biology technique that allows for the sensitive quantification of DNA methylation levels at a specific genomic locus on a DNA sequence in a small sample of genomic DNA. [1]
The Illumina Methylation Assay using the Infinium I platform uses 'BeadChip' technology [clarification needed] to generate a comprehensive genome-wide profiling of human DNA methylation. Similar to bisulfite sequencing and pyrosequencing , this method quantifies methylation levels at various loci within the genome .
Guardant Reveal, which runs on Guardant’s Smart Liquid Biopsy platform, is a blood test that uses epigenomic (methylation) analysis to detect circulating tumor DNA (ctDNA), a marker of minimal ...
In mammals, DNA methylation is common in body cells, [7] and methylation of CpG sites seems to be the default. [ 8 ] [ 9 ] Human DNA has about 80–90% of CpG sites methylated, but there are certain areas, known as CpG islands , that are CG-rich (high cytosine and guanine content, made up of about 65% CG residues ), wherein none is methylated.
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