The

Abstract We analyzed the surface phenotypes and cell cycle of twenty two hemopoietic cell lines using 7AAD/PY based on the cellular DNA/RNA content. Populations of G1a, G1b, S, and G2+M, DNA index (DI), and the RNA index of S phase (SRI) were calculated by means of DNA/RNA dot plots. Two new parameters were extracted from the cell cycle profiles, namely, the nucleic acid index of the S phase (NI) and the coefficient of variations in the RNA at S phase (SCV). DNA/RNA dot plots of cell lines revealed four characteristic profiles of the cell cycle defined with the calculated NI and SCV. Thes