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. Author manuscript; available in PMC: 2013 May 6.
Published in final edited form as: Biol Chem. 2011 Jul 7;392(0):689–697. doi: 10.1515/BC.2011.075

Figure 5. Summary and model for septin ring and collar formation.

Figure 5

(A) Summary of septin recruitment during the cell cycle based on fluorescence intensity measurements. Polarity establishment, bud emergence and splitting of the septin collar at the onset of cytokinesis are indicated. (B,C) Speculative models for septin filament assembly and organization. (I) A sparse irregular ring accumulates more septins by intercalation. (II) Bud emergence and continuing septin recruitment until they form an hourglass-shaped collar (III). Slower septin recruitment continues during G2/M (IV) until the collar splits during mitotic exit (V). After cytokinesis, the remnant septin ring (VI) is of larger diameter than the new septin ring that forms in the next cycle (I).