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. Author manuscript; available in PMC: 2023 Jan 12.
Published in final edited form as: Phys Rev X. 2022 Jul 11;12(3):031006. doi: 10.1103/physrevx.12.031006

FIG. 6.

FIG. 6.

Active foam: splaylike deformations, self-tearing, and roughening at the highest microtubule concentrations. (a) Maximum intensity z projections over 3 μm show a splaylike instability that generates density variation and self-tearing that yields condensates. (b) Evolution of a contracting condensate surface (left) x-y and x-z image cross sections (right). (c) The volume (solid blue curve) and surface area (black dashed curve) of a contracting condensate as a function of time. (d) The spatial correlation between surface normal vectors decay over time. Inset: Exponential fits to the normal-normal correlation decay between 5 and 20 μm show correlation length decreases by 50 μm over 80 min. (e) Two surface-bound monolayers zippering into a bilayer. The sample contains 200 nM kinesin (blue) and 40 μM tubulin (black).