The Sdic gene cluster. The cluster is composed by four Sdic genes, with an RT1C retrotransposable element upstream of each Sdic gene. The cluster is located between the parental genes Cdic and AnnX. Cdic is represented in blue, Sdic genes in green and AnnX in yellow; intergenic regions are grey; R represents RT1C elements. These genes are located in the minus strand, so the order of genes in this figure is the opposite order of these genes in Flybase.