Assertion: dinoflagellate's form | /r/AtLocation | some microalgae
Facets:
Source sentences:
text: Some phytoplankton require cobalamin for cobalamin-dependent methionine synthase (MetH), whereas an alternative form of methionine synthase (MetE) exists in some microalgae that do not require B 12 , alleviating them of most of their B 12 requirement