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Figure 3 | BMC Evolutionary Biology

Figure 3

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 3

Embryonic expression patterns of Sp genes in Drosophila melanogaster. (a-c) Expression of the Sp1-4 representative CG5669. (a) Stage 2 embryo. (b) Stage 9 embryo. (c) Stage 11 embryo. (d-i) Expression of the Sp5/btd representative btd. (d) Stage 4 embryo. (e) Stage 5 embryo. The arrow points to the anterior head domain that appears after the head stripe. (f) Stage 6 embryo. (g) Stage 8 embryo. (h) Stage 9 embryo. (i) Stage 11 embryo. (j-o) Expression of the Sp6-9 representative D-Sp1. (j) Stage 2 embryo. (k) Stage 10 embryo. (l) Stage 11 embryo. (m) Stage 13 embryo. (n) Stage 13 embryo, ventral view. (o) Stage 15 embryo. The arrowhead in k, l, m points to expression in the developing brain. The asterisk in m, n indicates expression in the antennal primordium. The arrows in m, n point to the thoracic limb primordia. The arrow in o points to expression in the developing ventral nerve cord. All embryos are arranged with anterior to the left.

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BMC Ecology and Evolution

ISSN: 2730-7182

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