Assertion: b vitamin's b vitamin | /r/HasProperty | cofactor
Facets:
value: for key metabolic processes
type: TRANSITIVE-OBJECT
Source sentences:
text: Each B vitamin is either a cofactor (generally a coenzyme) for key metabolic processes or is a precursor needed to make one.
text: Each B vitamin is a cofactor (a coenzyme) for some key metabolic processes or it is a precursor needed to make one.