Assertion: telomerase's activity | /r/HasProperty | restricted to progenitor cells
Facets:
value: in the adult human
type: OTHER
Source sentences:
text: In the adult human, activity of telomerase is restricted to tissue stem cells, progenitor cells and germ cells and is undetectable in the majority of adult somatic tissues, 1 - 3 primarily due to the repression of its catalytic subunit telomerase reverse transcriptase ( TERT ).