Allele-dropout using PCR-based diagnosis for the splicing mutation in intron-2 of the CYP21B-gene: successful amplification with a Taq/Pwo-polymerase mixture.


The splicing mutation in intron 2 (nucleotide 656) of the 21-hydroxylase gene (CYP21B) is the most common mutation causing congenital adrenal hyperplasia (CAH). Homozygosity for nt656G is associated with the classical phenotype of CAH. In several studies, a number of clinically asymptomatic relatives of CAH-patients were genotyped as nt656G homozygotes. We… (More)


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