Mutations induced by X-rays at the HPRT locus in cultured Chinese hamster cells are mostly large deletions
- PMID: 4069145
- DOI: 10.1016/0165-7992(85)90065-x
Mutations induced by X-rays at the HPRT locus in cultured Chinese hamster cells are mostly large deletions
Abstract
We investigated the molecular basis of 19 X-ray-induced HPRT-deficient mutants of V79 Chinese hamster cells with Southern hybridisation techniques. 12 of those mutants suffer from a big deletion (greater than 10 kb) of HPRT DNA sequences. Cytological studies of chromosome preparations of those 12 deletion mutants showed that in at least 3 of these mutants part of the long arm of the X-chromosome was lost. After correction for spontaneous arising mutations we estimate that at least 70-80% of X-ray-induced mutations are caused by large deletions.
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