Assertion: embryonic stem cell | /r/HasProperty | cultured under defined conditions
Facets:
value: in vitro
type: MANNER
value: to keep them
type: PURPOSE
Source sentences:
text: In vitro, embryonic stem cells can be cultured under defined conditions to keep them in their pluripotent state, or they can be stimulated with biochemical and physical cues to differentiate them to different cell types.