Uroporphyrinogen III
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Uroporphyrinogen III
Identifiers
CAS number	[1976-85-8]
PubChem	1179
MeSH	Uroporphyrinogen+III
Properties
Molecular formula	C40H44N4O16
Molar mass	836.795 g/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references

In the synthesis of porphyrin, Uroporphyrinogen III is created by the enzyme Uroporphyrinogen III synthase, and the enzyme Uroporphyrinogen III decarboxylase converts it into coproporphyrinogen III.

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