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We compare the expression patterns in Ciona intestinalis of three members of the Pax gene family, CiPax3/7, CiPax6 and Cipax2/5/8. All three genes are expressed in restricted patterns in the developing central nervous system. At the tailbud stage, CiPax3/7 is present in three patches in the brain and along the posterior neural tube, CiPax6 throughout the anterior brain and along the posterior neural tube and CiPax2/5/8 in a restricted region of the posterior brain. Double in situ hybridisations were used to identify areas of overlap between the expression of different genes. This showed that CiPax3/7 overlaps with the boundaries of CiPax6 expression in the anterior brain, and with CiPax2/5/8 in the posterior brain. The overlap between CiPax3/7 and CiPax2/5/8 is unlike that described in the ascidian Halocynthia rorezti.


Journal article


Gene Expr Patterns

Publication Date





743 - 745


Animals, Central Nervous System, Ciona intestinalis, Eye Proteins, Gene Expression, Homeodomain Proteins, PAX6 Transcription Factor, Paired Box Transcription Factors, Repressor Proteins, Transcription Factors