TABLE 1.
Pairing is observed in seven different cell lines
| Year established | Karotypeb
|
||||
|---|---|---|---|---|---|
| Line | Origina | II | III | % pairedc | |
| Kc167 | Embryos | 1969 | 4 | 3–5 | 78 |
| S2 | Embryos | 1972 | 4, 6 | 4, 6 | 76 |
| D | Embryonic haploid cells | 1978 | 2, 4 | 2, 4 | 83 |
| DH-33 | Embryos, D. hydei | 1980 | 4 | 4–5 | 82 |
| mbn2 | Hemocytes | 1980 | NDd | NDd | 69 |
| Clone 8 | Imaginal wing discs | 1990 | 2 | 2 | 87 |
| ML-DmBG2-c6 | Larval central nervous system | 1994 | 3e | 2e | 86 |
See Figure 1 for examples of mitotic figures and materials and methods for references for cell lines.
a
All cells lines were from D. melanogaster, except as noted for DH-33.
b
N > 50 for Kc167, N = 20 for clone 8, and N > 7 for all other lines except mbn2 (ND, not determined).
c
Data represent the percentage of single-signal nuclei as assayed at the 28B1 region (Figure 4A except in the case Kc167, where the data correspond to Figure 2C); N > 55 for each line.
d
Assumed tetraploid.
e
Aberrant chromosome morphology (Figure 1, G and H).