The P{lacW}Nrkk14301 insertion maps within both TppII and CG34439 (overlapping genes on opposite strands) by BLAST analysis of the flanking sequence of the insertion. In addition, in FBrf0139680, the P{lacW}Nrkk14301 insertion is stated to map "within the 5' end of an alternative-splice form of Nrk" (Nrk is located downstream to CG34439, and overlaps it on the same strand).