Direct, bisulfite-free 5mC and 5hmC sequencing at single-cell resolution

We report the first direct sequencing methodologies for quantitative detection of 5mC and 5hmC at single-base resolution and single-cell level, termed scTAPS (for 5mC + 5hmC) and scCAPS+ (for 5hmC specifically). With ~90% mapping efficiency, our methods accurately benchmark 5mC and 5hmC profiles in CD8+ T and mES cells, respectively. Notably, scCAPS+ revealed a global increase in 5hmC within the hippocampus of aging mice, both in neurons and in non-neurons. ### Competing Interest Statement The authors have declared no competing interest.