Counting molecules using next-generation sequencing (NGS) suffers from PCR amplification bias, which reduces the accuracy of many quantitative NGS-based experimental methods such as RNASeq. This is true even if molecules are made distinguishable using unique molecular identifiers (UMIs) before PCR ...
Read More »Accurate mapping of tRNA reads
Many repetitive DNA elements are transcribed at appreciable expression levels. Mapping the corresponding RNA sequencing reads back to a reference genome is notoriously difficult and error-prone task, however. This is in particular true if chemical modifications introduce systematic mismatches, while ...
Read More »A simple fragmentation model to compute the expected coverage profile across a transcript that is independent of bias
RNA sequencing (RNA-seq) has emerged as the method of choice for measuring the expression of RNAs in a given cell population. In most RNA-seq technologies, sequencing the full length of RNA molecules requires fragmentation into smaller pieces. Unfortunately, the issue ...
Read More »ViennaNGS – A toolbox for building efficient next- generation sequencing analysis pipelines
Recent achievements in next-generation sequencing (NGS) technologies lead to a high demand for reuseable software components to easily compile customized analysis workflows for big genomics data. Researchers at the University of Vienna present ViennaNGS, an integrated collection of Perl modules ...
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