Fig. 1.

EAG recorded from male antennae of transgenic flies expressing a pheromone receptor, SlitOR6, from S. littoralis (Orco-GAL4, UAS-SlitOR6) and from the lines used to obtain the crossings: Orco-GAL4 and UAS-SlitOR6. 2-Heptanone was used as positive control, and hexane as negative control. Z9, E12-14-OAc is a constituent of S. littoralis sex pheromone [15]. Source doses: 2-heptanone, 100 µg; Z9, E12-14-OAc, 1 µg. N = 6; error bars in all figures represent SEM, statistical significance at 5 and 1 % levels is denoted with one (*) and two (**) asterisks, respectively