Compound as reactive (2)
4 H+ + uroporphyrinogen-III → 4 CO2 + coproporphyrinogen III
2 S-adenosyl-L-methionine + uroporphyrinogen-III → 2 S-adenosyl-L-homocysteine + precorrin-2 + H+
Compound as product (1)
preuroporphyrinogen → H2O + uroporphyrinogen-III
Reversible reaction (1)
S-adenosyl-L-methionine + uroporphyrinogen-III ↔ S-adenosyl-L-homocysteine + precorrin-1 + H+