Figure 1.

Schematic representation of fru gene organization in Drosophila. A) Intron-exon organization of fru gene; P1 to P4 are alternative promoters; White boxes represent noncoding exons; S represents the sex-specifically spliced exon expressed only under P1 control; Orange boxes represent the BTB domain; Yellow boxes represent the connecting region; Boxes labeled A, B, C, and D represent alternative exons containing Zinc-finger domains (DNA-binding domains). B) Homologous region amplified in Anastrepha; Part of the BTB exon C2 was amplified but it was not used in the analyses. C) Alternative spliced transcripts. (Modified from Demir and Dickson [12])

Sobrinho and de Brito BMC Evolutionary Biology 2010 10:293   doi:10.1186/1471-2148-10-293
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