GCA_000013225.1 CYB_0566 definition uroporphyrin-III C-methyltransferase/uroporphyrinogen-III synthase GCA_000013225.1 CYB_1040 definition uroporphyrin-III C-methyltransferase GCA_000013225.1 CYB_1861 definition uroporphyrinogen decarboxylase