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. 2005 Apr;166(4):1041–1053. doi: 10.1016/S0002-9440(10)62325-5

Figure 1.

Figure 1

Hepatic heme synthesis leading to protoporphyria and possible impact with other metabolic systems. a: Scheme of heme metabolism showing negative feedback deregulation of ALA synthase 1 and cytochrome P450 induction and inhibition of ferrochelatase after griseofulvin treatment. b: Scheme of possible metabolic pathways and systems that might impact on hepatic heme metabolism.