P{GawB} insertion 5467 bp 5' of start of br transcript RF; 5868 bp into 11335-bp first intron (5' UTR) of br transcripts RA, RB, RD, RE and RG; 7985 bp into 13452-bp first intron (5' UTR) of br transcript RC.
Flies show an aberrant gravitaxic response in a vertical gravitaxic maze assay, and show wild type behaviour in a horizontal maze. Male courtship activity is comparable to wild type, and flight is not seriously impaired.