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. 2000 Jan 10;148(1):87–100. doi: 10.1083/jcb.148.1.87

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© 2000 The Rockefeller University Press

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Thin sections through the basal portion of bristles from thoraces that had been incubated with staurosporine for 5 h (36–41-h pupae). (a) Transverse section. Around the periphery of this bristle are 11 actin bundles and a central population of microtubules. Two of the bundles are depicted at higher magnification in the insets. Notice that although there are regions where the packing is hexagonal, in many places the packing lacks hexagonality and is disordered. (b) Longitudinal section through an actin bundle. If this figure is turned 90° so one can look across the bundle, one sees some 12-nm striations due to the fascin cross-bridge, but these striations are not present throughout the bundle, indicating a reduction of the fascin cross-bridge.