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Isolation and expression of Pax6 and atonal homologues in the American horseshoe crab, Limulus polyphemus.


ABSTRACT: Pax6 regulates eye development in many animals. In addition, Pax6 activates atonal transcription factors in both invertebrate and vertebrate eyes. Here, we investigate the roles of Pax6 and atonal during embryonic development of Limulus polyphemus rudimentary lateral, medial and ventral eyes, and the initiation of lateral ommatidial eye and medial ocelli formation. Limulus eye development is of particular interest because these animals hold a unique position in arthropod phylogeny and possess multiple eye types. Furthermore, the molecular underpinnings of eye development have yet to be investigated in chelicerates. We characterized a Limulus Pax6 gene, with multiple splice products and predicted protein isoforms, and one atonal homologue. Unexpectedly, neither gene is expressed in the developing eye types examined, although both genes are present in the lateral sense organ, a structure of unknown function.

SUBMITTER: Blackburn DC 

PROVIDER: S-EPMC2577597 | biostudies-literature | 2008 Aug

REPOSITORIES: biostudies-literature

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Isolation and expression of Pax6 and atonal homologues in the American horseshoe crab, Limulus polyphemus.

Blackburn David C DC   Conley Kevin W KW   Plachetzki David C DC   Kempler Karen K   Battelle Barbara-Anne BA   Brown Nadean L NL  

Developmental dynamics : an official publication of the American Association of Anatomists 20080801 8


Pax6 regulates eye development in many animals. In addition, Pax6 activates atonal transcription factors in both invertebrate and vertebrate eyes. Here, we investigate the roles of Pax6 and atonal during embryonic development of Limulus polyphemus rudimentary lateral, medial and ventral eyes, and the initiation of lateral ommatidial eye and medial ocelli formation. Limulus eye development is of particular interest because these animals hold a unique position in arthropod phylogeny and possess mu  ...[more]

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