Table 2. Effect of rrn deletions on rates of duplication formation.
Duplication ratea of indicated sites with or without deletions of rrn loci (×100) |
||||
---|---|---|---|---|
Deleted rrn loci | purHD | xja | metA | thrA |
None | 250 | 200 | 220 | 160 |
rrnE | 210 | 100 | 200 | 100 |
rrnH | 50 | 1.1 | 2.7 | 0.5 |
rrnE and rrnH | 1.5 | 0.7 | 2.5 | 0.8 |
Duplication rates are expressed as the frequency of duplication-bearing cells reached during growth of a cell with no duplication for 33 generations.