Figure 6.
Lack of negative feedback regulation. (A) ORN classes in the maxillary palp, indicating the endogenous Or genes they express (color) and the ectopic expression of Or85e (black) in all ORNs of C155-GAL4;UAS-Or85e. (B) In situ hybridizations to maxillary palps of C155-GAL4;UAS-Or85e with probes against the indicated Or RNAs. (C) Odor response profiles of: Or85e in the mutant ab3A empty neuron, showing strong response to fenchone (data from Goldman et al., 2005) (left); pb1A in control C155-GAL4 flies, showing response to 2-heptanone (center); a class of ORNs in C155-GAL4;UAS-Or85e, showing strong responses to both odorants (right). Odorants were tested as vapors of a 10−2 dilution. n=5; error bars=S.E.M.