Wayne:High Throughput Sequencing Resources: Difference between revisions

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<td>2.5μL</td>
<td>mv</td>
<td>2μL</td>
<td>Move (akin to cut/paste), to remove the file in the current location; Usage: mv current/path/filename destination/path/filename </td>
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<td>1.5-2μL</td>
<td>cp</td>
<td>0.8μL</td>
<td>Copy (also used to rename files if you keep them in their current path), keeps a copy in the current path; Usage: cp current/path/filename destination/path/filename</td>
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Revision as of 17:09, 15 February 2013

High throughput (HT) platform and read types

  • Illumina single-end vs. paired-end
  • 454 Roche
  • SOLiD
  • MiSeq
  • Ion Torrent

File formats and conversions

  • bcl
  • qseq
  • fastq



Deplexing using barcoded sequence tags

  • Editing (or hamming) distance



Quality control

  • Fastx tools
  • Using mapping as the quality control for reads



Trimming and clipping

  • Trim based on low quality scored per nucleotide position within a read
  • Clip sequence artefacts (e.g. adapters, primers)



DNA sequence analysis



RNA-seq analysis

  • Quantifying and annotating aligned reads
  • DESeq
  • edgeR

A variety of additional R packages are available for normalizing RNA-Seq read count data and identifying differentially expressed genes (DEG):

  • easyRNASeq (simplifies read counting per genome feature)
  • DEXSeq (Inference of differential exon usage)
  • DEGseq
  • baySeq (also see: segmentSeq)
  • Genominator (Bullard et al. 2010)


Basic server commands (for Sirius)

A suggested concentration for a general PCR cocktail:

Command Usage
pwd Print working directory (your current location
ls List (all contents of current location)
ls options -a (hidden files), -l (long/detailed list), -t (sorted by time modified instead of name)
cd Change directories
mkdir Make directories
mv Move (akin to cut/paste), to remove the file in the current location; Usage: mv current/path/filename destination/path/filename
cp Copy (also used to rename files if you keep them in their current path), keeps a copy in the current path; Usage: cp current/path/filename destination/path/filename
1.5-2μL 0.8μL
1μL 0.4μL
1μL 0.4μL
0.1μL 0.08μL
1μL 1μL


R basics

HT sequence analysis using R (and Bioconductor)