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Post convergent extension notochord morphogenesis. Normaski (A-H) and fluorescent (A’-H’) images of notochord in stable transgenic Ciona savignyi embryos expressing GFP under the Ciona intestinalis brachyury promoter. In these cells the GFP tends to accumulate in nuclei. Arrows indicate emergence of intercellular pockets (D and D’). Approximately 10 cells from the second quarter of notochord column are imaged. hpf: hours post fertilization at 16°C. Dorsal view, anterior to the left.
