Fig. 2. (A,B) Distribution of pnr RNA in mutant embryos for Abd-BM1 and linG1. There is pnr expression in A8, in contrast to wild-type embryos (compare with Fig. 1C). (C) Confocal images of a double labelling for pnr and brk expression in several segments of an stage 13 embryo. Dorsal is towards the top. Although brk (red) is expressed ventral to pnr (green) there is a zone of overlap, as indicated by comparing the images of the A1 and the A2 segments, for which only the green (A1) and red (A2) channels are shown.