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. 2018 Sep 4;294(14):5408–5419. doi: 10.1074/jbc.TM118.000831

Figure 2.

Figure 2.

Fe(II) recycling of α-KG–dependent dioxygenases. The catalytic activity of α-KG dioxygenases utilizes oxygen for the decarboxylation of α-KG and oxidation of Fe(II) to Fe(IV), rendering the enzyme inactive. Vitamin C can be used to regenerate iron back to the Fe(II) state, thus restoring catalytic activity.