| abstract |
This disclosure provides methods for cost-effective bisulfite-free identification in DNA, including whole genomic DNA, of the locations of one or more of 5-methylcytosine, 5-hydroxymethylcytosine, 5-carboxylcytosine and 5-formylcytosine. The methods described herein are based on the conversion of modified cytosine (5mC, 5hmC, 5fC, 5caC) to dihydrouracil (DHU), for example by TET-assisted pyridine borane treatment, followed by endonuclease cleavage of the DHU, and identification of the cleavage site, which corresponds to the location of the modified cytosine. |