PLoS Biology Issue Image | Vol. 5(4) April 2007
Gastrulating jellyfish embryo showing cell boundaries (red), nuclei (blue), and cilia (green).
An embryo of the cnidarian Clytia hemisphaerica fixed during gastrulation, showing cell boundaries (red), nuclei (blue), and cilia (green). Two distinct Frizzled family receptors produced from RNAs with opposite localizations in the egg provide the spatial cues to specify the gastrulation site and the polarized orientation of the cilia (see Momose and Houliston, e70).
Image Credit: Confocal image by Tsuyoshi Momose