Protoporphyrinogen IX is converted a protoporphyrin IX by protoporphyrinogen oxidase.

原卟啉原IX被原卟啉原氧化酶转化为原卟啉IX。

Protoporphyrinogen IX is converted to protoporphyrin IX by protoporphyrinogen oxidase.

原卟啉原IX在原卟啉原氧化酶催化下生成原卟啉IX。

Lastly, an iron molecule is added to a protoporphyrin IX via the enzyme ferrochelatase.

最后，铁分子通过亚铁螯合酶添加到原卟啉IX中。