Assertion: centrosome | /r/HasProperty | collected by centrifugation
Facets:
value: onto a 60% sucrose cushion
type: TRANSITIVE-OBJECT
Source sentences:
text: Centrosomes were collected by centrifugation onto a 60% sucrose cushion and further purified by centrifugation through a discontinuous (70%, 50% and 40%) sucrose gradient.