FIG. 2.

Rheology of Pf1 networks crosslinked by Mg²⁺ or Mn²⁺. Shear storage (closed symbols; A) and loss (open symbols, B) moduli of 0.5 % Pf1 crosslinked by various [Mn²⁺] after oscillatory deformation at 2% maximal shear strain over a range of frequencies. Strain dependence of shear storage moduli as a constant frequency of 10 rad/s for 0.5 % Pf1 without divalent cations (open circles) or with 10 mM Mn²⁺ (closed circles) or 20 mM Mg²⁺ (triangles) (C). Shear storage modulus measured first at 2% strain (closed circles), then at 80% strain (triangles) and again at 2% strain 1 minute after the 80% strain deformation (open circles).