Figure 4.

Expression of leucokinin receptor (Lkr) in identified neurons of the adult Drosophila brain. (A) Lkr-Gal4 expression in the brain and subesophageal zone (SEZ). The boxed areas contain ALKs (ALK/ITPn) and the encircled area shows the insulin-producing cells (IPCs). (B) Ion transport peptide (ITP) immunolabeling in the same brain. The ITPn that also express LK are indicated. (C) DILP2 (insulin-like peptide 2) immunolabeling in IPCs in the same brain. (D) Merging the three channels, it is clear that ITPn and IPC co-express Lkr-Gal4 (these are boxed and encircled in A, respectively). Figure reproduced from [38] with permission from the publishers.