Abstract
Recent studies on insect patterning suggest that the genetic hierarchy may be roughly conserved in phylogenetically divergent species, but pair-rule genes may not function identically in all insects. In order to understand potential evolutionary changes in the role of the pair-rule genes, a Bombyx even-skipped homolog was cloned and its expression pattern during early embryogenesis studied. Eight stripes of Bombyx even-skipped were progressively expressed in an antero-posterior order. Later, these stripes disappeared anteriorly. Under this detection system, Bombyx even-skipped stripes clearly do not resolve into the corresponding secondary stripes, an obvious difference from Drosophila and Tribolium. These results suggest that Bombyx even-skipped may serve a double-segment defining role and may determine the odd-numbered engrailed stripes.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Amino Acid Sequence
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Animals
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Bacterial Proteins*
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Base Sequence
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Bombyx / embryology*
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Bombyx / genetics*
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Cloning, Molecular
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DNA, Complementary / genetics
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DNA-Binding Proteins / genetics
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Drosophila Proteins*
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Evolution, Molecular
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Female
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Gene Expression Regulation, Developmental
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Genes, Insect*
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Homeodomain Proteins / genetics*
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In Situ Hybridization
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Insect Proteins / genetics*
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Kruppel-Like Transcription Factors
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Male
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Molecular Sequence Data
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Repressor Proteins*
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Sequence Homology, Amino Acid
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Transcription Factors / genetics
Substances
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Bacterial Proteins
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DNA, Complementary
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DNA-Binding Proteins
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Drosophila Proteins
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Homeodomain Proteins
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Insect Proteins
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Kruppel-Like Transcription Factors
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Repressor Proteins
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Transcription Factors
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eve protein, Drosophila
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hb protein, Drosophila
Associated data
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GENBANK/D38486
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GENBANK/D38487
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GENBANK/D42088