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. 2020 Jan 15;9:1540. doi: 10.3389/fonc.2019.01540

Figure 2.

Figure 2

Putative processes controlled by increased heme synthesis in cancer. The reason why tumors enhance heme synthesis is unknown. Several hypotheses have been explored: increased heme synthesis could control energy production, ADP/ATP exchange between mitochondria and cytosol, TCA cycle cataplerosis, P53 activity and stability, as well as the activity of hemoproteins and of heme binding proteins involved in the circadian clock machinery.