Expression of Tep genes in adults. ISH on paraffin-embedded longitudinal and transverse sections. a, b Tep2. c-h Tep4. i-n Tep6. Left-hand panels = Tep gene expression; right-hand panels = controls. The probe used for ISH is indicated on the top right corner of each panel, whereas the genotype is indicated on the bottom right corner. The following tissues are shown: crop (arrows) and hypoderm (arrowheads; a-f, i, j); head (g, h); proventriculus (cardium; k, l); mesophragma (arrowheads; e, f, m, n). For Tep6, we used the sense probe on wild-type (WT) flies as control, as Tep6 mutants (Mcr) are lethal.