TABLE 1.
Distribution of nonecotropic proviral env and LTR sequences in wild mice
| Strain | Subspecies | No. of reactive fragmentsa
|
||||||
|---|---|---|---|---|---|---|---|---|
| Xenotropic
|
Polytropic
|
Modified polytropic
|
Type A Xeno/Poly (KT-45) | |||||
| env | LTR | env | LTR | env | LTR | |||
| AKR/J | 11 | 25 | 17 | 38 | 11 | 24 | 0 | |
| HRS/J | 8 | 19 | 21 | 46 | 9 | 23 | 0 | |
| C3H/HeJ | 8 | 16 | 15 | 34 | 7 | 17 | 0 | |
| C57BL/6J | 18 | 36 | 22 | 46 | 10 | 26 | 1 | |
| CAST/Ei | M. m. castaneus | 26 | 35 | 0 | 30 | 1 | 5 | 15 |
| CZECH II/Ei | M. m. musculus | >60 | >100 | 5 | 23 | 4 | 1 | 0 |
| MOLC/Rk | M. m. molossinus | >60 | >100 | 2 | 14 | 2 | 6 | 4 |
| MOLF/Ei | M. m. molossinus | >60 | >100 | 2 | 14 | 1 | 3 | 5 |
| MOLG/Dn | M. m. molossinus | >60 | >100 | 2 | 14 | 2 | 5 | 4 |
| WSB/Ei | M. m. domesticus | 1 | 9 | 11 | 39 | 15 | 35 | 0 |
| ZALENDE/Ei | M. m. domesticus | 1 | 11 | 8 | 23 | 23 | >50 | 0 |
a
Approximate numbers of junction fragments as determined by counting the bands in the unblots shown in Fig. 1 and 7. Exact determinations require genetic analysis as well (11, 15). Results for fragments whose hybridization patterns were unlinked relative to inbred laboratory strains are shown in boldface type.