Assertion: choline | /r/CapableOf | act as methyl donors
Facets:
value: to homocysteine
type: TRANSITIVE-OBJECT
Source sentences:
text: Choline and folate, interacting with vitamin B 12 , act as methyl donors to homocysteine to form methionine, which can then go on to form SAM (S-adenosyl methionine).