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We compared Zic homologues from a wide range of animals. Striking conservation was found in the zinc finger domains, in which an exon–intron boundary has been kept in all bilateralians but not cnidarians, suggesting that all of the bilateralian Zic genes are derived from a single gene in a bilateralian ancestor. There were additional conserved amino acid sequences, ZOC and ZF-NC. Combined analysis...
Recent accumulating evidence revealed that planarian central nervous system (CNS) has numerous functional domains distinguished by a large number of neural markers, suggesting that primitive animals which developed CNS already had the framework of the brain development. It is of interest to investigate genes which have been acquired at an early stage of evolution for brain pattern formation. One such...
We have isolated a planarian Forkhead box A (FoxA, a new name for a gene group containing HNF3α,β,γ)-related gene, DjFoxA, and examined its spatial and temporal distribution in both intact and regenerating planarians by in situ hybridization. In intact worms, DjFoxA is specifically expressed in the cells participating in pharynx development in the region surrounding the pharynx, which is located in...
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