Fig. 2.

Tachykinin receptor (DTKR) expression in the olfactory receptor neurons (ORNs). (A) Molecular analysis of the dtkr expression in ORNs. Reverse transcriptase PCR products from isolated antennae and whole heads of w¹¹¹⁸ flies. Expression of dtkr in antennae and in whole heads is observed. However, dtk expression (peptide precursor) is only detected in heads. Parallel reactions with rp49 as a template control were performed. (B and C) DTKR immunoreactivity was observed in the ORNs (arrows) of the antenna (Bi and Bii) and in most of the glomeruli of the antennal lobe neuropils (C) of w¹¹¹⁸ flies. The 2 antennal lobes are shown in a frontal 9-μm thick section.