Prolonged activators of RP-ORNs.

(a) Representative traces of tonic response to carvone (top) and phasic response to methyl butanoate (bottom) upon 0.5 sec odor stimulation (bar). (b) Mean activity of RP4B neuron at times after an initial 3 sec stimulus of indicated odorant (10−1). (c) Percentage inhibition derived from the ratios of acetophenone responses upon prolonged-activator stimulation over acetophenone responses upon solvent delivery at the same time points. Black bar: 0.5 sec stimuli duration. n = 3.