Fig. 2

Expression domains of Go-opsin1 in adult Platynereis dumerilii. a–e Differential Interference Contrast images of adult Platynereis dumerilii (aligned anterior–posterior:top–bottom) stained by whole mount in situ hybridisation for Go-opsin1 (purple) (Additional file 5). a Whole head overview with Go-opsin1 expression in cells aligned along the edge of the peristomal cirri (c). Adult eyes (ae), palps (p) and antennae (a) are also indicated. Ocular expression (b, c) and dorsal neuronal expression (d, e) are shown. 40× magnification of Go-opsin1 cells in the peristomal cirri (f) and anal cirri (i) are shown alongside corresponding sense probe negative controls (g; peristomal cirri, k; anal cirri). 63× magnification of an individual Go-opsin1-expressing cell is shown in the peristomal (h) and anal (j) cirri. Scale bars: 50 μm for a, b, d, i and k, and 20 μm for c, e, f, g, h and j. Black arrowheads: Go-opsin expressing cells