Aae paps expression is detected in salivary glands developing adjacent to the proventriculus. (A-D) Aae paps expression is not detected in placodes in the VNE (ventral view of anterior segments in (A), lateral views of anterior segments in (B-D); respective ages are indicated). (E) Aae paps expression is detected in the developing salivary glands on either side of the proventriculus at 52 h of development (dorsal view shown). (F) At 66 h of development, large salivary tubes with high levels of Aae paps expression are evident (arrows, dorsal view is shown). The two lateral ducts attached to the anterior portion of the secretory tubes express paps and have joined (white arrowhead). Embryos are oriented anterior-left in all panels.