As for bcdΔ21.LZ i.e. a deletion of bases 4056-4726 (coordinates of FBrf0047926) in bcd 3' UTR, with addition of a 1.3kb Ecol\lacZ gene fragment to aid detection in in situ hybridizations, and with addition of one copy of that sequence deleted in bcdΔ14, the BLE.
Transcripts are not localized in the oocyte.