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ferrochelatase

n. (context biochemistry English) An enzyme, localized to the mitochondrion, that catalyses the terminal (eighth) step in the biosynthesis of heme, converting protoporphyrin IX into heme.

Wikipedia
Ferrochelatase

Ferrochelatase is an enzyme that is encoded by the FECH gene in humans. Ferrochelatase catalyses the eighth and terminal step in the biosynthesis of heme, converting protoporphyrin IX into heme B. It catalyses the reaction:

protoporphyrin + Fe ↔ heme B + 2 H