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Updated: Nov 23, 2025

Selective Capture of 5-hydroxymethylcytosine from Genomic DNA
Published on: October 5, 2012
One-pot intramolecular cyclization of 5-hydroxymethylcytosine for sequencing DNA hydroxymethylation at single-base
Yangde Ma1, Ning Zhang, Shaokun Chen
1University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, P.R. China. lixiangj@ucas.ac.cn.
Abstract:
Here we establish a one-pot reaction to directly convert the DNA base 5-hydroxymethylcytosine (5hmC) to an intramolecular cyclization nucleobase, which loses both protons of the exocyclic N4-amino group and thus is recognized as thymine (T) by DNA polymerase. Based on this 5hmC-specific reaction, a prospective bisulfite-free strategy for 5hmC sequencing is proposed. This is also the first example to show modified DNA labeling in non-water solvent-dominant media for DNA sequencing.
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