alexa Digital PCR.
Mathematics

Mathematics

Journal of Biometrics & Biostatistics

Author(s): Vogelstein B, Kinzler KW

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Abstract The identification of predefined mutations expected to be present in a minor fraction of a cell population is important for a variety of basic research and clinical applications. Here, we describe an approach for transforming the exponential, analog nature of the PCR into a linear, digital signal suitable for this purpose. Single molecules are isolated by dilution and individually amplified by PCR; each product is then analyzed separately for the presence of mutations by using fluorescent probes. The feasibility of the approach is demonstrated through the detection of a mutant ras oncogene in the stool of patients with colorectal cancer. The process provides a reliable and quantitative measure of the proportion of variant sequences within a DNA sample.
This article was published in Proc Natl Acad Sci U S A and referenced in Journal of Biometrics & Biostatistics

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