200bp deletion in the middle of the β4GalNAcTB transcription unit. A w+mW.hs marker has been inserted in place of the deleted sequence.
Homozygous adults are recovered and they appear morphologically normal and do not have behavioural phenotypes.
β4GalNAcTBGT β4GalNAcTA4.1 double mutants are viable, fertile and morphologically normal. The double mutant flies show locomotor defects (reduced climbing ability and bang sensitivity) similar to those seen in β4GalNAcTA4.1 single mutants.