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Actin organization and sperm nucleus migration. Egg cells expressing Lifeact-tagRFP without (A–F) or treated with (G–K) 2 μm latrunculin B were fused with sperm cells expressing H2B-GFP, and resultant zygotes were observed at the time point indicated. An arrow indicates the nucleus surrounded by actin filaments. Bars = 20 μm.
