Similar to the known miR-9a/miR-9 targets senseless13 and Foxg1 (ref. 14), we found that miR-9a binds to and enriches sNPFR1 mRNA over RP49 control RNA in Drosophila S2 cells and NPY2R mRNA over GAPDH control RNA in rat insulinoma INS-1 cells (Fig. 6b,e). This evidence concerns the gene NPY2R and pancreatic insulinoma.