Changes in RI distribution of HeLa-FUCCI cells under cytoskeletal perturbation. (a–c) Shown is the maximal projection of RI tomograms of HeLa-FUCCI cells in (a) control, (b) cytoD, and (c) noco treatment. Scale bars, 20 μm. (d) Given are the mean RI-values of cytoplasm, perinuclear cytoplasm, nucleoplasm, and nucleoli in individual cells under cytoskeletal perturbation. The dashed line indicates the mean RI-value of the cytoplasm in control cells. (e) Shown are the relative changes of the mass, volume, and sphericity of the cytoplasm and nuclei under cytoD and noco treatment compared with control. (f) Shown is the mass density ratio between nucleoplasm/cytoplasm (ρnp/ρc), nucleoplasm/perinuclear cytoplasm (ρnp/ρpc), and nucleoli/nucleoplasm (ρnl/ρnp) at the same phases of the cell cycle. The dashed lines indicate equal mass density of the compartments. The numbers of cells measured are N = 1565, 973, and 717 for control, cytoD, and noco treatments, respectively. (g) Given is a schematic indicating the effect of the cytoD and noco treatment on the volume, RI, and shape of cells. To see this figure in color, go online.