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Leftward flow of NVPs. A ventral view of a mouse embryo whose membrane lipids have been fluorescently labeled with a DiI dye is shown. The anterior side of the node (triangular blank structure in the center) is placed upward in the movie, so that the leftward flow of NVPs appears as rightward movement in the movie. Bar, 10 µm. 20x time lapse. Reproduced from Tanaka et al. (2005).
