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. 2008 May 27;6(5):e125. doi: 10.1371/journal.pbio.0060125

Figure 7. The Expression Program Is Conserved and Enhances ORN Sensitivity.

Figure 7

Electrophysiological analysis of the maxillary palp neurons from D. melanogaster and D. pseudoobscura. On the left is a receptor-to-neuron map of the D. melanogaster maxillary palp. The bar graphs on the right represent the responses in spikes per second, of different neurons, to a diagnostic set of odors that can be used to distinguish the functional expression of the different Or genes. Error bars = SEM; n = 10. For each sensillum type, the light-colored bar represents the A cell; the darker bar represents the B cell. The responses are measured as the change in action potential frequency following the onset of odorant stimulation. The map and the data for D. melanogaster are from [21]. We note that the maxillary palps of both species contain a small number of neurons that have not been well characterized yet.