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Chromatin domain boundaries, like scs or gypsy insulators in Drosophila, have been identified in transgene assays through their enhancer-blocking activity. Boundary elements in the bithorax complex (BX-C), such as Fab-7 and Fab-8, have been identified genetically and been shown to have insulator activity in transgene assays. However, it is not clear whether boundary elements identified in transgene...
A cDNA clone encoding a β-thyroid hormone receptor (TRβ) from muscovy duckling liver was isolated and sequenced. Comparison with the chicken TRβ sequence showed a high degree of homology. This cDNA was used as a probe to characterize the TRβ mRNA transcripts expressed in muscovy duckling liver.
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