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. 2021 Jan 28;9(1):51–61. doi: 10.1016/j.gendis.2021.01.005

Figure 2.

Figure 2

The reversible processes of methylation and demethylation of m6A modification. METTL3, METTL 4 and WTAP act as methylases to transfer the methyl-group onto the sixth carbon atom of substrate mRNA from the reactive methyl compound SAM. The demethylase FTO and ALKBH5 erase the m6A modification from the methylated mRNA strand.