Figure 2.
pdm3 is expressed in neurons of the olfactory system. A, Drosophila olfactory organs. The third segment of the antenna is indicated by an arrowhead, and the maxillary palp is indicated by an arrow [reprinted with permission from Carlson (1996), his Fig. 1]. B, pdm3 in situ hybridization to the antenna shows expression in a subset of cells, in blue. C, pdm3-expressing cells of the maxillary palp, stained by an RNA probe in red, are also stained in the nucleus by anti-Elav (green), a marker for mature Drosophila neurons. D, E, A control maxillary palp stained with anti-Pdm3 in red (D, E) and anti-Elav in green (E). F, G, A pdm3 maxillary palp stained with anti-Pdm3 in red (F, G) and anti-Elav in green (G). The nuclear anti-Pdm3 staining visible in neurons of the control maxillary palp is lost in the mutant. The control used here and in the remainder of this study is a precise excision of the transposon insertion.