Breaks approximately 4.5kb upstream of the 5' end of the pnr transcription unit.
position of restriction fragment on reference sequence inferred by FlyBase curator
In(3R)iab6G/pnrV1 flies show a severe thoracic cleft, head defects and split tergites. In(3R)iab6G/pnrVX6 flies are lethal as pupae and have strong imaginal defects. Heterozygotes exhibit a strong thoracic cleft and an iab5 phenotype (loss of bristles).
P. Heitzler.
Class 3 pnr allele: dominant allele causing loss of bristles.