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Figure 5


Fig. 5. Actin localisation in vibrator spermatocytes. In wild-type primary spermatocytes, actin appears as a compact ring at the spindle midzone (arrow, A) and remains localised in the constricted contractile ring, which forms during cytokinesis (arrow, C). In comparison, actin has a broad and discontinuous localisation in vibrator primary spermatocytes at telophase (arrow, B). Binucleate cells at prophase of meiosis II occur in vibrator secondary spermatocytes that have failed the previous cytokinesis. These cells show a disorganised accumulation of actin within the plasma membrane (arrow, D). Dispersed foci of actin are also present throughout the cell. Microtubules, green; actin, red; DNA, blue. Bars, 10 µm.





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