Table 4.
TLS across a site-specific TT 6-4 PP in polη-proficient and polη-deficient human cells
Cell type | Transformants |
Plasmid repair, % |
TLS, % | ||
---|---|---|---|---|---|
KanR | CmR | ||||
Primary fibroblasts | POLH+/+ | 323 | 2064 | 14±3 | 13±3 |
POLH−/− (XPV) | 274 | 2207 | 12±2 | 11±2 | |
SV-40 transformed fibroblasts | POLH+/+ | 154 | 332 | 41±4 | 40±4 |
POLH−/− (XPV) | 342 | 1022 | 29±2 | 28±2 | |
Burkitt's lymphoma cells | POLH+/+ | 88 | 566 | 15±2 | 14±1 |
POLH−/− | 68 | 790 | 8±1 | 7±1 |
The experiments were performed as described in the legend to Table 1, except that the gap-lesion plasmid was GP-TT-6-4-PP (kanR). The extent of plasmid repair was calculated by the kanR/cmR ratio, and the extent of TLS was obtained by calculating this value by the percentage of TLS events out of all repair events, as determined by DNA sequence analysis, and shown in Table 5 and Table 6. The colony counts are of a representative experiment. The efficiencies of plasmid repair and TLS were obtained by averaging the results of at least three experiments.