Fig. 3. Dose/response relationships of four types of olfactory receptor neuron.
Values are the number of spikes over 1 s (means ± S.E.M.). (A) Type 1
neurons responded to the pheromone component (R,Z)-6-nonen-2-ol, with
the (S)-enantiomer having a 100-fold higher response threshold
(N=13). (B) The response pattern of the type 2 neurons is a mirror
image of that of the type 1 neurons; they responded to the pheromone component
(S,Z)-6-nonen-2-ol (N-11). (C) Type 3 neurons responded to
two compounds, (R)-heptan-2-ol and (R,Z)-4-hepten-2-ol, with
the response threshold for the respective (S)-enantiomers being
approximately 100 times higher (N=5). (D) Type 4 neurons responded to
both nine-carbon ketones with a preference for (Z)-6-nonen-2-one over
nonan-2-one (N=5). Dose/response curves are not shown for type 5
neurons because these neurons responded only to nonan-2-one and only at high
concentrations.
