Fig. 2.
The pMos{rops::egfp}vbci2 strain reveals a complex set of unpigmented noncephalic photoreceptors. (A and A′) Schematic drawing of four segments of the ventral Platynereis trunk (A) and a view onto a parapodium (A′). Rectangles and labels indicate regions and orientation of A′ and B–D; green circles indicate location of noncephalic PRCs, green lines demarcate typical projection trajectories. (B–D) Representative examples of noncephalic PRCs (green) visualized by EGFP fluorescence in living animals (B and D) or by anti-GFP immunohistochemistry (C); arrows indicate cell bodies and arrowheads projections. (B and C) Notopodial cell and its projection along nerves II (II) and I (I) into a longitudinal fiber (lof) in the ventral nerve cord; t demarcates turning point away from nerve II; nervous system highlighted by antiacetylated tubulin staining (red). (D) Midventral cell in the ventral nerve cord. (A and D) Ventral views, anterior to the left; (A′ and B) frontal views dorsal to the top; (C) ventral view, anterior to the top. np, notopodial cell; mv, midventral cell; vl, ventrolateral cell.