by viable cell sorting , by subsequent subculturing , and by the use of biochemical , biophysical , and immunological assays , not only have the g0 resting and g1 ( cycling ) cell cycle phases been objectively characterized , but a separate subpopulation of quiescent cells that are functionally viable and deeply committed to nonproliferation , the q cells , has been identified .
C1516337
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C0007634
cells