Scatter Plot Diagram of Apoptosis Rate Through Flow Cytometry Analysis of HeLa Cell after 72 Hours PPME Treatment at IC50 Value. Apparently, no decipherable changes have exhibited within the 24, 48 and 72 hours of observations. The figure is representing the PPME treatment on HeLa cell within periods. (A) Untreated HeLa cell; (B) Treated HeLa cell, (Q3) Live cell, (Q4) Early apoptosis, (Q2) Late apoptosis, (Q1) Necrotic/dead cell.