Fig. 7. glide regulation in the embryonic epidermis. (A,F,K) Schematic representation of epidermal cells in a segment of wild-type (A), patched (F) and wingless (K) stage-13 embryos. Black vertical lines indicate segment borders. The single row of border cells (red cell) is posterior to each segment border (A). Ectopic border cells are present in (F) and are absent in (K). (B,C,G,H,L,M) glide in-situ hybridisation on wild-type (B,C), patched (G,H) and wingless (L,M) embryos. (D,E,I, J,N,O) Stripe expression revealed by immunolabelling on wild-type (D,E), patched (I,J) and wingless (N,O) embryos. (C,E,H,J,M,O) Regions delimited by dots in B,D,G,I,L,N, respectively. Note that in patched embryos, glide and stripe are ectopically expressed (compare G,H with B,C and I,J with D,E, respectively) whereas, in wingless embryos, neither glide nor stripe are expressed in the epidermis (compare L,M with B,C and N,O with D,E, respectively). Red bracket in C and white bracket in E show wild-type expression of glide mRNA and Stripe protein, respectively. Red and white brackets in H,J indicate ectopic expression of glide and stripe, respectively. Red and white asterisks in M,O indicate the loss of glide and stripe expression, respectively. Scale bars: 50 µm.