Fig. 2.
Cross-linking regulates tactoid interfacial tension. (A) Tactoid (1.5 mol % capping protein) images, visualized with TMR-actin for filamin concentration from 2.5 to 15 mol %. Aspect ratio (black open circles) and ratio of anisotropic to isotropic interfacial tension, γA/γI (green diamonds), as a function of filamin concentration. (B) An arbitrary shaped liquid droplet with purely isotropic interfacial tension relaxes to an equilibrium shape of a sphere, whereas a droplet with purely anisotropic interfacial tension relaxes to an elongated, cylindrical equilibrium shape. (C) Model predictions of liquid droplet shape for varying isotropic and anisotropic interfacial tension ratios.