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Embryos expressing solely BarrenTEV were injected with 12 mg/ml of a dominant-negative form of the human E2 ubiquitin-conjugating enzyme (UbcH10C114S), to induce a metaphase arrest, and subsequently injected with buffer. Embryos also express His2A–mRFP1 (red) and Cid-EGFP (green); scale bars, 10 μm. Times (minutes:seconds) are relative to the time of buffer injection.
