Protoporphyrin IX

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Protoporphyrin IX
Molecular formula C34H34N4O4
Molar mass 562.658 g/mol
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

In the metabolism of porphyrin, protoporphyrin IX is created by the enzyme protoporphyrinogen oxidase, and the enzyme ferrochelatase converts it into heme.

Heme synthesis - note that some reactions occur in the cytoplasm and some in the mitochondrion (yellow)