Figure 4.
Responses of OSNs to single odorants. These diagrams show the responses of individual OSNs (rows) to single odorants (50 μm) (columns) from different odorant mixtures, as indicated. The blue boxes indicate odorants to which OSNs responded with an increase in intracellular calcium, as determined by calcium imaging. The number of OSNs that responded to each odorant in the mixture is shown in parentheses below. Individual OSNs varied in the number and combination of odorants to which they responded from the same mixture. Some odorants activated many OSNs, whereas others activated only one OSN or none.