Video 3. Long-term tracking of a nuclear red stained embryo.

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Time-lapse movie of dorsal maximum z-projections of epiblast cells labeled with nuclear red showing their tracks from stage 5HH to 5 somites during PS regression. Colors indicate the z-position from magenta (dorsal) to yellow (ventral). t = 4 min between frames, z-sectioning = 4 μm. 20× objective, LSM 780. NMP: neuromesodermal progenitors; PMP: presomitic mesoderm progenitors; LPP: lateral plate progenitors. PS = primitive streak; NT: neural tube.