Popis: |
In this report, the frequency of the G→A transition polymorphism at nucleotide 5557 in exon 39 of the coding sequence of the gene mutated in ataxia-telangiectasia (ATM) was analysed. The frequency of the A and G alleles was estimated in the general population at 0·15 and 0·85, respectively. This polymorphism can be identified by single-strand conformation polymorphism (SSCP) and by a simple and rapidDdeI digestion after polymerase chain reaction (PCR)-mediated site directed mutagenesis (PSDM). |