Figure 2. Total cellular mass growth during senescence induction. HT-p21 cells were grown in 60 mm wells and soluble protein and GFP were measured daily. Closed bars: HT-p21 cells were treated with IPTG (+IPTG). Open bars: Untreated HT-p21 cells (-IPTG). In both proliferating (-IPTG) and non-proliferating (+IPTG) conditions, protein