Assertion: centromere's gene | /r/HasProperty | juxtaposed
Facets:
Source sentences:
text: Insulator sequences may act as a barrier in rare cases where constitutive heterochromatin and highly active genes are juxtaposed (e.g. the 5'HS4 insulator upstream of the chicken β-globin locus, and loci in two Saccharomyces spp.).