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Figure 9 | BMC Evolutionary Biology

Figure 9

From: A clustered set of three Sp-family genes is ancestral in the Metazoa: evidence from sequence analysis, protein domain structure, developmental expression patterns and chromosomal location

Figure 9

Chromosomal location of the Sp-family genes in the genomes of selected animal species. Single genes are represented by small colored boxes, Hox gene clusters are denoted by a larger red box. The Sp-family genes are color-coded according to the three clades revealed by the phylogenetic sequence analysis; the colors are explained in the legend below the drawings. The Hox cluster in D. melanogaster is split into two parts, the Antennapedia complex (ANT-C) and the Bithorax complex (BX-C). Continuous genomic regions are indicated by solid black lines, dashed lines indicate unclear conditions due to incomplete genome assembly. Genes, gene clusters and genomic loci are not drawn to scale. The numbers above the Sp genes in H. sapiens denote the gene name (Sp1 to Sp9). The denominations left of the black lines indicate the chromosome (X is the X-chromosome), or the linkage group (for A. mellifera, T. castaneum); un denotes localisation of the gene in an unassembled region of the genome in species where the genome assembly is incomplete. For N. vectensis the scaffolds containing Hox and Sp genes are shown and are arranged into the hypothetical ancestral linkage group PAL A [50]. The hypothetical linkage between these scaffolds is indicated by the dotted lines.

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