An alternate nonisotopic technique of PCR-mediated allele-specific oligonucleotide analysis for the detection of a point mutation.

We report a simple protocol for the allele analysis of a point mutation using polymerase chain reaction. Conditions have been determined to use probes prepared for the conventional allele-specific oligonucleotide hybridization method directly. After amplification of the genomic region containing the mutation site, the nested polymerase chain reaction was performed using an allele-specific oligonucleotide probe as one side of the primer. Specificity of the amplification was achieved by decreasing the primer concentration in a two segment thermal cycling pattern. This protocol does not require additional special primers and an allelic mutation can be determined non-isotopically.