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

之后，羟甲基胆素通过啉原III协同合成酶啉原III，再由啉原脱羧酶催粪啉原III。

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

然后，粪啉原Ⅲ被运送回线粒体，并通过粪啉原氧酶原啉原IX。

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

之后，羟甲基胆色烷啉原III，并分别通过啉原Ⅲ共合酶与啉原脱羧酶催形成粪啉原Ⅲ。