Unidentified insertion into an intron.
8-kb insert in 13-kb intron at about 120 + P insert distal to transcription unit at 30 kb; Coordinates estimated from Cohen, Broenner, Kuettner, Jurgens and Jaeckle (1989); origin undefined; positive values extend to left.
Fails to develop limbs.
Adler.
Selected as: Enhancer of Su(z)2.