Fig. 3. Exon/intron organization of AgdsxF and AgdsxM and comparison with the female and male transcripts of Dmdsx. Exons are shown as boxes, where black boxes represent untranslated regions and open boxes represent coding regions. The OD1 domain is indicated by diagonal hatched boxes, and the non-sex-specific region of the OD2 domain by stippled boxes. Male- and female-specific regions of the OD2 domains are indicated by vertical and horizontal hatched boxes, respectively. In Agdsx, a male-specific region of the OD2 could not be identified. Introns and exons are numbered according to the sequence of the female transcripts. The exon/intron boundary between the last common exon and the sex-specific regions is conserved between Dmdsx and Agdsx. Vertical arrows indicate the region where the dsxREs and PREs are found. Introns are not shown to scale.