Fig. 4.

Relative rotational body speed $\overline{\mathrm{\Omega }}/\overline{{\mathrm{\Omega }}_0}$ vs. fluidity $\left(1/\eta \right)$, normalized to the fluidity of the motility buffer (c = 0), for all polymer solutions we studied. Full and dashed lines are those used by BT to summarize their MC and Ficoll data, respectively. BT’s MC data spanned a smaller interval $\left(0.2\lesssim {\eta }_s/\eta <1\right)$ than ours.