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Allelotyping large numbers of samples by allele-specific polymerase chain reaction (PCR) can be problematic if the DNA samples to be tested are of highly variable concentration. On the one hand, analysis of dilute DNA samples often requires nested PCR to produce a product of sufficient yield to be detectable on ethidium bromide-stained agarose gels. Such two-step assays require additional reagents,...
Abstract The transthyretin (TTR) Ile 122 variant is associated with cardiac amyloidosis in individuals of African descent. To determine the prevalence of the allele encoding TTR Ile 122 in African-Americans, we have used PCR and restriction analysis to test DNA from African-Americans from various geographic areas, and found an allele frequency of 66/3376 (0.020), which is higher than the value we...
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