fig5
Figure 5. Repair of 1-methyladenine and 3-methylcyotsine. The reaction converts α-ketoglutarate to succinate with CO2 release and requires oxygen and Fe(II). There is also a release of formaldehyde to regenerate the normal base. 1-meA: 1-methyladenine; 3-meC: 3-methylcytosine.