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Additional Supporting Information may be found in the online version of this article.

FilenameFormatSizeDescription
DVDY_22687_sm_suppfig1.tif1083KSupporting Figure 1 Principal neighbor cell changes along the mediolateral axis and in the vicinity of the presumptive primitive streak area, showing relative positions of the cells involved at the start (a, b, and c) and at the end (a′, b′, and c′) of their movement. The relative position of the cells in every group of cells was depicted with green (start) and magenta (end) triangles to highlight the principal change in the arrangement as a result of conventional intercalation (A) or in different processional cell movement (PCM) subclasses (B, C, D).
DVDY_22687_sm_suppmovie1.mov5328KSupporting Movie 1 Cell movements (L- and U-turns) in the posterior half of DAPI (4′,6-diamidine-2-phenylidole-dihydrochloride) -stained rabbit embryonic disc before gastrulation by means of multiphoton time-lapse recording. The still pictures shown in Figure 2 were taken from this movie. For details see legend of Figure 2A–C.
DVDY_22687_sm_suppmovie2.mov5106KSupporting Movie 2 Cellular movements in the presumptive primitive streak area (same image series as in Supp. Movie S1) demonstrating processional cell movement (PCM) semiquantitatively. Processional cells were marked “a” and their neighboring cells “b” and “c.” The relative position of the cells in every group of cells was depicted with green (start) and magenta (end) triangles to show the changes in the arrangement as a result of PCM. For details, see Figure 2D–G.
DVDY_22687_sm_suppmovie3.mov1596KSupporting Movie 3 Processional cell movement (PCM) as seen with differential interfering contrast (DIC) time-lapse recording shown in Fig. 3. The changes in the relative position of the neighboring cells were illustrated with triangles as in movie 2. For details, see legend of Supp. Movie S2 and Figure 3.
DVDY_22687_sm_suppmovie4.mov4745KSupporting Movie 4 Three triplets of neighboring cells in the presumptive primitive streak area exhibiting processional cell movement (PCM). For details, see legend of Supp. Movie S2.
DVDY_22687_sm_suppmovie5.mov3161KSupporting Movie 5 Rapid metaphase plate rotation in the posterior gastrula extension (PGE) area as seen with differential interfering contrast (DIC) time-lapse recording shown in Figure 6. For details, see legend of Figure 7.
DVDY_22687_sm_suppinfo.pdf383KSupporting Information.

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