Assertion: lead pencil's lead | /r/CapableOf | inhibit porphobilinogen synthase
Facets:
value: in the human body
type: LOCATION
Source sentences:
text: In the human body, lead inhibits porphobilinogen synthase and ferrochelatase, preventing both porphobilinogen formation and the incorporation of iron into protoporphyrin IX, the final step in heme synthesis.