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Fig. S3
Notch induction in the vasculature is compromised in embryos treated with MEK inhibitor (SL327). Notch activity is reduced in the vasculature of SL327-treated Tg(kdrl:mCherry); Tg(Tp1bglob:Venus-PEST) embryos. Still images from time-lapse microscopy of a representative experiment are shown. Arrows indicate Notch signaling-positive ISVs, while asterisks indicate Notch-negative ISVs. Scale bar = 20 μm. See Videos S1 and S2.
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