Assertion: frog | /r/CapableOf | modify available toxin
Facets:
value: to produce a more efficient variant
type: PURPOSE
Source sentences:
text: It is not clear which prey species supplies the potent alkaloid that gives golden poison frogs their exceptionally high levels of toxicity, or whether the frogs modify another available toxin to produce a more efficient variant, as do some of the frogs from the genus Dendrobates.