Assertion: blood cell's nucleus | /r/HasAspect | about 3000 to 4000 pores
Facets:
value: throughout its envelope
type: LOCATION
Source sentences:
text: The nucleus of a typical mammalian cell will have about 3000 to 4000 pores throughout its envelope, each of which contains an eightfold-symmetric ring-shaped structure at a position where the inner and outer membranes fuse.