Next, coprophyrinogen III is brought back into the mitochondria and converted into protoporphyrinogen IX by coproporphyrinogen oxidase.

然后，卟啉Ⅲ被运送回线粒体，并卟啉酶转卟啉IX。

Afterwards, hydroxymethylbilane is converted to Uroporphyrinogen III and catalyzed to coproporphrinogen III, via uroporphyrinogen III co-synphase and uroporphyrinogen decarboxylase respectively.

之后，羟甲基胆色烷转尿卟啉III，并分别尿卟啉Ⅲ共合酶与尿卟啉脱羧酶催形成卟啉Ⅲ。

Afterwards, hydroxymethylbilane is converted to uroporphyrinogen III and catalyzed to coproporphyrinogen III via uroporphyrinogen III cosynthase and uroporphyrinogen decarboxylase, respectively.

之后，羟甲基胆素尿卟啉III协同合成酶转尿卟啉III，再由尿卟啉脱羧酶催卟啉III。