The Ndg1 and Ndg2 alleles were created in my lab by Jianli Dai. - In Ndg1, two segments are deleted: 2R:10314236..10315587 and 2R:10316460..10319543 . In addition, two nucleotides (TT) are introduced after position 10316459. - In Ndg2, segment 2R:10314244..10319546 is deleted. Coordinates refer to the latest Flybase release (FB2018_06, released Dec 21, 2018).