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Accession IconGSE56457

A comprehensive assessment of RNA-seq accuracy, reproducibility and information content by the Sequence Quality Control consortium

Organism Icon Homo sapiens
Sample Icon 16 Downloadable Samples
Technology Badge IconIllumina HumanHT-12 V4.0 expression beadchip, Affymetrix Human Gene Expression Array (primeview), Affymetrix Human Gene 2.0 ST Array (hugene20st)

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Description
We present primary results from the Sequencing Quality Control (SEQC) project, coordinated by the United States Food and Drug Administration. Examining Illumina HiSeq, Life Technologies SOLiD and Roche 454 platforms at multiple laboratory sites using reference RNA samples with built-in controls, we assess RNA sequencing (RNA-seq) performance for sequence discovery and differential expression profiling and compare it to microarray and quantitative PCR (qPCR) data using complementary metrics. At all sequencing depths, we discover unannotated exon-exon junctions, with >80% validated by qPCR. We find that measurements of relative expression are accurate and reproducible across sites and platforms if specific filters are used. In contrast, RNA-seq and microarrays do not provide accurate absolute measurements, and gene-specific biases are observed, for these and qPCR. Measurement performance depends on the platform and data analysis pipeline, and variation is large for transcriptlevel profiling. The complete SEQC data sets, comprising >100 billion reads (10Tb), provide unique resources for evaluating RNA-seq analyses for clinical and regulatory settings.
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