Examining the conserved mechanical features in different cytoskeletal networks #links# should shed light on the design principles underlying their self-organization. Cytoplasmic extracts from the Xenopus laevis eggs, arrested in metaphase of meiosis II, were prepared as previously described ( Desai et?al., 1999). Meiotic spindles were assembled by addition of demembranated sperm nuclei to the?extr


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