(a) DEP collection time profiles obtained at 4Vpp (from top to bottom) at 10 kHz (brown), 100 kHz (blue star), 1 MHz (yellow), 3 MHz (pink), 5 MHz (light blue), 7 MHz (blue triangle), 10 MHz (green), 30 MHz (red), and 50 MHz (black). (b) Collection rate frequency dependence measured from 3 kHz to 50 MHz. Standard deviation was calculated over three “frequency series” measurements, performed on three different electrodes. The solid lines correspond to the Clausius–Mossotti model calculated with the parameters presented in Table and assuming either spherical rRNA (red curve), with depolarization factor *A*=1∕3 or stretched rRNA (blue curve) with *A*=0.1, corresponding to a prolate ellipsoid of ratio 3:1 for the major and minor axes. (c) corresponds to the Clausius–Mossotti model with dispersion parameters ε_{s}=108 ε_{0} and ε_{∞}=78 ε_{0} obtained from Ref. , *K*_{s}=0.15 nS and *f*_{xo}=1 MHz (blue curve) or *f*_{xo}=9 MHz (red curve). In both cases, the rRNA is considered to be spherical (A=1∕3). (d) corresponds to the Clausius–Mossotti model with parameters ε_{s}=83 ε_{0}, ε_{∞}=77 ε_{0}, *K*_{s}=0.1 nS, and *f*_{xo}=1 MHz. In this case, rRNA is considered elliptical with a ratio of 3:1 for the major and minor axes, corresponding to a depolarization factor A=0.1

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