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| Content Provider | PubMed Central |
|---|---|
| Author | Lieb, M. Allen, E. Read, D. |
| Abstract | Five amber mutations in the repressor (cI) gene of bacteriophage λ recombine anomalously with nearby cI mutations. When any of these markers is used in four-factor crosses, cI + recombinants that are expected to require three crossovers occur at high frequencies. These recombinants are attributable to very-short-patch (VSP) repair of specific mismatches in DNA heteroduplexes formed during recombination between the markers flanking cI. The sites of the repairprone mutations and the lengths of repair tracts have now been determined. Amber mutations subject to VSP repair are C to T transitions in (see PDF), the sequence methylated by the product of gene dcm, and also in the related 5'CAGG or 5'CCAG sequences. Ambers arising in CAG sequences found in other contexts, or in codons other than CAG, were not subject to VSP repair. Repair tracts rarely, if ever, exceed ten nucleotides in length, and can be as short as two nucleotides. A repair-prone mutation does not stimulate recombination between flanking cI markers. |
| Starting Page | 1041 |
| File Format | |
| ISSN | 00166731 |
| Journal | Genetics |
| Issue Number | 4 |
| Volume Number | 114 |
| Language | English |
| Publisher Date | 1986-12-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics |
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