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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Branch migration displacement assay with automated heuristic analysis for discrete DNA length measurement using DNA microarrays
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Branch migration displacement assay with automated heuristic analysis for discrete DNA length measurement using DNA microarrays

机译:使用自动启发式分析的分支迁移位移测定法,用于使用DNA微阵列进行离散DNA长度测量

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摘要

The analysis of short tandem repeats (STRs) plays an important role in forensic science, human identification, genetic mapping, and disease diagnostics. Traditional STR analysis utilizes gel- or column-based approaches to analyze DNA repeats. Individual STR alleles are separated and distinguished according to fragment length; thus the assay is generally hampered by its low multiplex capacity. However, use of DNA microarray would employ a simple hybridization and detection for field forensics and biology. Here we demonstrate a rapid, highly sensitive method for STR analysis that utilizes DNA microarray technology. We describe two adaptations to accomplish this: the use of competitive hybridization to remove unpaired ssDNA from an array and the use of neural network classification to automate the analysis. The competitive displacement technique mimics the branch migration process that occurs during DNA recombination. Our technique will facilitate the rapid deduction of identity, length, and number of repeats for the multiple STRs in an unknown DNA sample.
机译:短串联重复序列(STRs)的分析在法医学,人类鉴定,基因作图和疾病诊断中起着重要作用。传统的STR分析利用基于凝胶或色谱柱的方法来分析DNA重复序列。各个STR等位基因根据片段长度进行分离和区分。因此,该测定通常因其低多重能力而受阻。但是,DNA微阵列的使用将采用简单的杂交和检测方法进行现场取证和生物学研究。在这里,我们演示了一种利用DNA微阵列技术进行STR分析的快速,高度灵敏的方法。我们描述了两种实现此目的的适应方法:使用竞争性杂交从阵列中去除未配对的ssDNA,以及使用神经网络分类来使分析自动化。竞争性置换技术模仿了DNA重组过程中发生的分支迁移过程。我们的技术将有助于快速推断未知DNA样品中多个STR的同一性,长度和重复数。

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