Fig. 6.

Zero-shear viscosities of tetrapeptide droplets. (a) Tracking of a free bead inside a settled droplet. (b) A short 2-dimensional trajectory of a bead (1.13 μm in radius) in an LLssLL droplet prepared at 5.5 mg/mL and pH 10, tracked by a brightfield camera. (c) MSDs (solid curves) of beads inside four LLssLL droplets. The fit to a linear function for one MSD curve (orange) is displayed as a red dashed curve. (d) Zero-shear viscosities of tetrapeptide droplets with X = F, L, and M at pH 10. Error bars represent standard deviations among four beads.