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Fig. 8. Ultrastructural effects of jasplakinolide, which stabilizes actin filaments and can induce actin polymerization, on the pore-linked filament network in Xenopus oocyte nuclei. (A) Jasplakinolide does not disrupt the organization of the pore-linked filament network, visualized by feSEM. (B,C) Higher magnification feSEM images of pore-linked filaments after treatment with jasplakinolide; C is an enlargement of the region boxed in B. Arrows in C indicate three parallel rows of axially projecting short filaments.