Assertion: telomerase | /r/HasProperty | absent
Facets:
value: normally
type: DEGREE
value: in normal somatic cells
type: LOCATION
value: nearly always
type: TEMPORAL
value: as in normal somatic cells
type: OTHER
Source sentences:
text: Telomerase is absent or only present at very low levels in most human cells.
text: Telomerase is absent or below detectable levels in most somatic cells.
text: When telomerase is low or absent, as in normal somatic cells, telomeres shorten at each cell division.
text: At about the same time, Greider and associates found that telomerase was nearly always absent in normal somatic cells.
text: Telomerase is active in gametes and most cancer cells, but is normally absent from, or at very low levels in, most somatic cells.
text: In normal circumstances, where telomerase is absent, if a cell divides recursively, at some point the progeny reach their Hayflick limit, which is believed to be between 50 and 70 cell divisions.