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When telomeres reach a critically short length (approximately 4-5 kilobases in humans), cells enter replicative senescence a permanent state of growth arrest where cells remain metabolically active but can no longer divide
Li X, Zeng Z
At even higher pH, the amino group loses the extra proton, and the prevalent species is the doubly-negative anion OOCCH(NH 2 )(CH 2 ) 2 COO
Supplied as lyophilised powder for in-vitro research use only
Both physicians and pharmacies should prepare for sustained scrutiny
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