Xenbase Image ID: 78446

Fig. 1. Histological analysis of prehypochord cells in the early endoderm. All sections are transverse through the trunk of the embryo posterior to the developing pronephric tubules; (A) is stained with Brilliant Cresyl Blue and (B and C) with Toluidine Blue. (A) Stage 20. The dorsalmost endoderm cell has a distinguishable triangular shape. Surrounding endoderm cells are columnar. (B) Stage 22. The dorsalmost cell in the endoderm layer has taken on a more rounded appearance as it delaminates and is beginning to reorient within the endoderm. (C) Stage 24. The mostdorsal cell is now flattened against the dorsalmost periphery of the endodermal epithelium and lies at an angle to the adjacent columnar endoderm cells. (D-F) Traced outlines of sections A-C showing position of the prehypochord cell (blue) within the dorsal endoderm. n, notochord; arrow, prehypochord cell. Image published in: Cleaver O et al. (2000) Copyright © 2000. Image reproduced with permission of the publisher and the copyright holder. This is an Open Access article distributed under the terms of the Creative Commons Attribution License. Larger Image Printer Friendly View

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