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Biosynthesis and degradation of heme, an iron‐bound protoporphyrin molecule utilized by a wide variety of metabolic processes, are tightly regulated. Two closely related enzymes, heme oxygenase 1 (HMOX1) and heme oxygenase 2 (HMOX2), degrade free heme to produce carbon monoxide, Fe2+, and biliverdin. HMOX1 expression is controlled via the transcriptional activator, NFE2L2, and the transcriptional...