dsu:Dsui_1602 K01749 hydroxymethylbilane synthase [EC:2.5.1.61] | (GenBank) porphobilinogen deaminase dsu:Dsui_1601 K01719 uroporphyrinogen-III synthase [EC:4.2.1.75] | (GenBank) uroporphyrinogen-III synthase dsu:Dsui_1600 K02496 uroporphyrin-III C-methyltransferase [EC:2.1.1.107] | (GenBank) putative enzyme of heme biosynthesis