Figure 3From: Evaluation of clonal origin of malignant mesothelioma Sensitivity of the HUMARA assay by gel and capillary electrophoresis. To establish the sensitivity of the HUMARA assay for detection of minor alleles, different amounts of HpaII-digested (mono-allelic) and non-digested (representing bi-allelic DNA) #1290 DNA were mixed in different rations and subjected to PCR for detection of HUMARA locus. PCR products were resolved on a 3% agarose gel containing 0.5 ug/ml ethidium bromide and detected under UV light (A) or using the Applied Biosystems 3100 Genetic Analyzer (B). CTR denotes the no template control. 100, 75, 50, 25, 12.5, 6.25 and 0 indicate the percentage of bi-allelic DNA in the PCR reaction (A). Linear regression analysis calculated with Prism 6 software, shows comparison between input and detected allelic/biallelic ratios as calculated using Genescan software. (R2 > 0.98). The minor allele was reliably detectable when present at a fraction greater than or equal to 1/8 (12.5% of the input copies) (C).Back to article page