Assertion: vasopressin's receptor | /r/HasProperty | characterized
Facets:
value: recently
type: TEMPORAL
value: because of its scarcity
type: CAUSE
Source sentences:
text: The human V 3 receptor (V 3 R, previously known as V 1B R) is a G-protein-coupled pituitary receptor that, because of its scarcity, was only recently characterized.