As for bcdΔ11 i.e. a deletion of bases 4242-4294 (coordinates of FBrf0047926) in bcd 3' UTR, with addition of a 1.3kb Ecol\lacZ gene fragment to aid detection in in situ hybridizations.
The locailzation ofbcdΔ7.T:EcollacZR is defective compared to wild type bcd mRNAlocalization. Faint signal is detected along the anterior margin of the oocyteand transcript is detected in a difuse pattern in the anterior part of the earlyembryo.