To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1 A time-lapse record of the division of a cell in the animal pole domain that expresses GFP from the transgene Sp-SoxC:GFP BAC. The embryo is 24 h at the beginning of recording, and the 13 second movie records 65 minutes of development. Notch signaling patterns neurogenic ectoderm and regulates the asymmetric division of neural progenitors in sea urchin embryos Dan O. Mellott, Jordan Thisdelle, and Robert D. Burke Development 2017. 144:3602-3611; doi: 10.1242/dev.151720 Download Original Video