Xenbase Image ID: 130085

Fig. 2. Metrics for quantifying gastrulation. (A) Blastopore closure: ratio of the blastoporal surface area (yellow) to the surface area of the vegetal hemisphere (green) of the embryo. (B) Convergent extension: length-to-width ratio of the Xnot domain (red outline). (C) Spherical approximation to the embryonic surface visualized by reprojecting the 2D image into 3D. White lines in B and C indicate the dorsal midline. (D) Archenteron measurement: distance in degrees between the dorsal lip of the blastopore (blue line) and the anterior limit of the archenteron (white line); degrees of arc between the anterior limit of the Xnot domain (pink line) and the anterior limit of the archenteron (white line); degrees of arc between the dorsal mesendodermal mantle (orange line) and the center of the blastopore. (E) Archenteron inflation: area of the archenteron at the mid-sagittal plane divided by the area of the embryo at that plane. Image published in: Ewald AJ et al. (2004) Copyright © 2004. 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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