GO:0033014

5-aminolevulinate synthase (RefSeq)
Porphobilinogen deaminase (PBG) (Hydroxymethylbilane synthase) (HMBS) (Pre-uroporphyrinogen synthase) (RefSeq)
5-aminolevulinic acid synthase (ALAS) (RefSeq)
porphobilinogen synthase (RefSeq)
5-aminolevulinic acid synthase (ALAS) (RefSeq)
putative uroporphyrinogen III synthase (RefSeq)