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Figure Caption
Fig. S3
Final steps of pruning type I.
A small, lumenized branch is made of two cells (A). Lumen collapses when the branch is still multicellular (B); after lumen collapse, cells move away from each other, and the cell–cell contact surface shrinks (C). The last cell–cell contact (D, green arrow) is eventually resolved completely as the last cytoplasmic extention of the bridging cell detaches from the major branch (E). See also S9 Movie.
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