Assertion: centromere's region | /r/RelatedTo | heterochromatin
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Despite the divergence in DNA sequence and CENP-A organization, centromeric chromatin can in most organisms be separated into two regions: the centromere core, marked by CENP-A nucleosomes, and a pericentromeric region, usually associated with heterochromatin.