Figure 6

Comparison of the expression patterns of Tc-prd and Tc-dac in the mandible and maxilla suggest the mandible is composed of one endite. All views lateral is to the right and distal is top unless otherwise indicated. (A) Tc-dac (blue) and Tc-prd (red) expression in the dissected maxilla of a germ band retracting embryo. There are two domains of Tc-dac expression, a proximal domain (white arrowhead) and a distal domain (arrow). Tc-dac expression overlaps with Tc-prd in the distal half of the developing lacinia endite (black arrowhead). Tc-dac expression is lacking from the proximal half of this endite and faint in the galea endite. (B) Expression of Tc-dac (blue) and Tc-prd (red) in a dissected mandible of a germ band retracting embryo. Tc-dac is co-expressed with Tc-prd in the outer lobe (arrowhead). Tc-dac expression is lacking in the inner lobe (star). The proximal domain of Tc-dac which is not co-expressed with Tc-prd is indicated (white arrowhead). (C) Diagram of the dissected maxilla shown in A. (D) Diagram of dissected mandible shown in B. (E) Ventral view of dissected maxilla, distal is top. (F) Simplified representation of the endite expression of Tc-prd (red) and Tc-dac overlap (purple) in an endite. Compare with the developing lacinia shown in E. Distal to the top.