Abstract
Sex determining geneMab-3 ofC. elegans anddoublesex ofDrosophila contain a common DNA binding motif called a DM domain, both of which regulate similar aspects of sexual development. Humandoublesex- related geneDMRT1 has been identified, which also contains the conserved DM-related DNA-binding domain and plays an essential role in gonadal differentiation. We present the amplification of a broad spectrum of DM domain sequences from phylogenetic diverse vertebrates (Cynops orientalis,Chrysemys scripta elegans andCoturnix coturnix) using degenerate PCR. Our results further reveal the unexpected complexity and the evolutionary conservation of the DM domain gene family.
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