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. 2020 Mar 7;118(8):1968–1976. doi: 10.1016/j.bpj.2020.03.002

Figure 4.

Figure 4

Poisson ratio estimates of the actin cortex in mitotic HeLa cells. (a) A histogram of estimated KS/KB at f = 0.1 Hz (green line represents lognormal distribution of maximal likelihood) is given. (b) A histogram of corresponding Poisson ratios is given (green line: distribution induced by lognormal distribution in a). (c) Box plots of estimated Poisson ratios at different frequencies are given. From left to right, median values: 0.66, 0.48, 0.34, 0.17; IQR: 0.26, 0.38, 0.48, 0.45. Stars indicate significant differences between distributions according to p-values of a Mann-Whitney test (∗p < 0.05, ∗∗p < 0.01, ∗∗∗p < 0.001). (d) Fitted distributions of estimated Poisson ratios for cell deformations at frequencies F = 0.02, 0.1, 1, and 10 Hz are shown. To see this figure in color, go online.