Figure 1

Complex pattern and dynamics of Amos expression in the embryo. Amos expression (green) relative to Ato expression (magenta) during neurogenesis. All embryos are lateral views unless otherwise stated. (A) Wild type, stage 10. Amos is expressed in PNCs for the dbd sensory neurons (blue circles – but no expression in segment T1) and a variety of head sense organs. Possible fates of the head organs are indicated. The to and lbo patches (yellow circles) appear homologous to the dbd PNCs. Ato is expressed in the SOP that arises from the dbd clusters. (B) Wild type, stage 11. Amos is now expressed in new clusters for the dmd1 neurons and lbso or lbo sense organ. Again, Ato is coexpressed with Amos in the trunk. (C) amos¹mutant embryo, stage 10. Ato expression in the dbd cells is abolished. (D) amos¹mutant embryo, stage 11. Ato expression in the dmd1 cells is abolished. Note that truncated Amos protein is detected in the amos¹embryos [1]. do = dorsal organ; to = terminal organ; vo = ventral organ; pao = papilla organ; lbo = labial organ; lbso = labial sense organ; dmd = dorsal multiple dendritic neuron; dbd = dorsal bipolar neuron.