Fig. 2.

Genomic Structures of E(spl) complexes. Schematic phylogeny of Arthropods with structures of E(spl)-C from examined species. Colour coding of bHLH genes follows Fig. 1 (bHLH-1, light blue; bHLH2, Dark blue; her, green). Red hexagons indicate mα genes. White ovals indicate inserted genes with no homology to bHLHO or mα, brown ovals represent Tubulin Tyrosine ligase genes. Purple circles mark gooseberry genes. Where the colour of a bHLH gene is lightened, identification of this gene is only through placement in the complex due to gaps in the genome sequence. Where a white square is shown, placement in the complex cannot indicate the identity of the partial gene sequence. Yellow squares indicate E(spl) type bHLHs from Strigamia that are not able to be classified. Arrows indicate direction of transcription. Structures for the Endopterygota are predicted based on analyses of complex from these groups (Figs. 3, 4, 5 and 6)