Fig. 7. Odorant representations of pheromones.

(A) Average peak responses of the 11 chemosensory neurons to ascaroside pheromones #1, #2, #3, #5, and #8 at a concentration of 200 nM. Responses are reported as ∆F/F₀, and significant responses (q ≤ 0.01) are indicated with stars. (B) Fraction of volatile odorants (out of 23 odorants total), which elicited significant responses in each neuron at high concentration (first row), compared with the fraction of pheromone stimuli (out of five stimuli total), which elicited significant responses (second row). Many neurons (such as ADF and ADL) that are narrowly tuned with respect to volatile odorants appear to be activated more often by the ascaroside pheromones.