Neural Marker Genes Differently Expressed in Subsets of Embryonic Neural Cells of the Ascidian Halocynthia roretzi

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Ascidians are lower chordates that possess a possible prototype of the vertebrate nervous system. The central and peripheral nervous systems of ascidian larvae are composed of only a few hundred cells (Nicol and Meinertzhagen, 1991). To investigate how these ascidian nervous systems develop, dissection at the molecular level using subset-specific markers is essential. Here we describe four new genes zygotically expressed in subsets of the ascidian neural cells. The spatial expression domains of these genes overlap in some parts but not in other parts of the nervous systems. Our results suggest that there are functionally different regions in the nervous systems owing to the gene expression differences. Further analyses of these genes will enable us to determine the molecular neuro-developmental characteristics of various clusters of neural cells.

収録刊行物

  • Zoological Science

    Zoological Science 19 (8), 885-889, 2002-08

    Zoological Society of Japan

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