Fig. 4.

Summary of literature shear moduli versus frequency, offset vertically for clarity. From top to bottom: mechanical measurements from cell creep (magnetic pulling) (13) (a), uniaxial rheometry (14) (b), atomic force microscopy (15) (c), LTM in the lamellae (6) (d), cell creep (magnetic bead twisting) (16) (e), MTC (8) (f), and optical tweezers (17) (g). All data are well fit to a sum of power laws (Eq. 2). Interestingly, magnetic pulling and uniaxial rheometry (a and b) results have fit slopes of 0.29 and 0.26 (comparable to our intracellular curve), respectively, whereas others (c–g) have slope of 0.16–0.18 (comparable to our cortical curve).