Table 3. Responses to pyrethrum components of four pyrethrum-responsive odorant receptors in the Drosophila ab3A empty neuron.

Components	Or42b	Or7a	Or59b	Or98a
Pyrethrin I	+	+++	●	●
Pyrethrin II	+++	++	+	●
Jasmolin I	+++	●	●	●
Jasmolin II	+++	●	+	●
Cinerin I	+	●	●	●
Cinerin II	●	●	●	●
(E)-β-farnesene	●	●	●	+
Control	●	●	●	●

Note: “●,” n < 20 spikes/s; “+,” 20 ≤ n < 40 spikes/s; “++,” 40 ≤ n < 60 spikes/s; “+++,” n ≥ 60 spikes/s. Each compound was delivered in 30 μL of 100 mmol L^-1 except for (E)-β-farnesene which was delivered in 30 μL of 394 mmol L^-1; n = 6 flies/sensilla.