Fig. 6. Decarboxylation of F-5caC is a rapid process and occurs in diverse mammalian cells. (a–c) Quantification of F-5caC, F-dC, and F-5mC levels in genomic DNA of HEK293T cells upon feeding of 300 μM of F-5caC for different times. (d) Quantification of F-5caC, F-dC, and F-5mC levels in genomic DNA of Jurkat-T, MCF-7, and Neuro-2a cells upon feeding of 300 μM of F-5caC for 3 d. (e) Schematic illustration of the active 5mC demethylation through two pathways: the direct decarboxylation of TET-produced 5caC to cytosine in mammalian genomes established in the current study and the previous TET-TDG-BER pathway.
