Table 2 Number of ng genes identified in 7 representative species (D. melanogaster, D.ananassae, D. obscura, D. subobscura, D. willistoni and D. virilis). Each column corresponds to a genomic region. Note that the 87A1 locus is located 5 Mb away from Sgs5 and that the 3C11–12 locus is 500 kb away from Sgs1 in D. melanogaster. No ng gene was found near Sgs1, Sgs3e and Sgs3x
Species | 3C11–12 (near Sgs4, Notch and dnc) | 68C11 (near Sgs3b, Sgs7, Sgs8) | 68C13 (near Sgs3f, Sgs3g) | 28E6-28E7 (near mon2, Bsg and CG8673) | 87A1 (near cad87A, CG6959 and sad) | 88C3–4 (near Cystatin-like, Phosphodiesterase 6 and stumps) |
|---|---|---|---|---|---|---|
D. melanogaster | 4 | 2 | 4 | none | none | 4 |
D. ananassae | none | 8 | 4 | none | 10 | 4 |
D. obscura | 6 | none | 2 | none | none | 1 |
D. subobscura | 5 | none | none | none | none | 3 |
D. willistoni | none | none | none | 2 | none | 2 |
D. virilis | none | none | none | none | none | none |
D. hydei | none | none | none | none | none | none |