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  • zlu
    replied
    This may be really obvious but I'm trying to understand how to you decide which is ref and which is test. If I have 2 bam files generated by mapping Illumina reads from 2 individuals against the NCBI reference genome, does it mean either one can be ref or test?

    Leave a comment:


  • CNV-seq, to detect Copy Number Variation using next-generation sequencing

    CNV-seq, a new method to detect copy number variation using high-throughput sequencing.

    more details at BMC Bioinformatics :
    Background DNA copy number variation (CNV) has been recognized as an important source of genetic variation. Array comparative genomic hybridization (aCGH) is commonly used for CNV detection, but the microarray platform has a number of inherent limitations. Results Here, we describe a method to detect copy number variation using shotgun sequencing, CNV-seq. The method is based on a robust statistical model that describes the complete analysis procedure and allows the computation of essential confidence values for detection of CNV. Our results show that the number of reads, not the length of the reads is the key factor determining the resolution of detection. This favors the next-generation sequencing methods that rapidly produce large amount of short reads. Conclusion Simulation of various sequencing methods with coverage between 0.1× to 8× show overall specificity between 91.7 – 99.9%, and sensitivity between 72.2 – 96.5%. We also show the results for assessment of CNV between two individual human genomes.


    The package is at

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