Molecular haplotype determination using allele-specific PCR and pyrosequencing technology - PubMed (original) (raw)
Molecular haplotype determination using allele-specific PCR and pyrosequencing technology
Monica Pettersson et al. Genomics. 2003 Sep.
Abstract
Haplotyping of single-nucleotide polymorphisms (SNPs) is usually performed statistically by computational analysis or by time-consuming cloning techniques. Here we present a simple molecular approach for reliable haplotype determination on individual samples. The procedure is based on allele-specific PCR (AS-PCR) in combination with Pyrosequencing analysis. AS-PCR primers for each allelic variant of the investigated SNPs were used. A mismatch introduced at the second base from the 3' end dramatically improved allele specificity. Analysis of multiple SNPs on amplified fragments using Pyrosequencing technology allowed determination of haplotypes. Genotyping of heterozygote samples after AS-PCR gave a typical monoallelic pattern at each SNP, in which the identity of the present allele depended on the allele-specific initial amplification. Haplotype determination by the described procedure proved to be highly reliable. The results obtained by Pyrosequencing technology have the benefit of being truly quantitative, enabling detection of any nonspecific allele amplification.
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