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