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  • Difference between TopHat and Illumina-CASAVA

    We are analyzing illumina 75bp paired-end RNA-seq data. For mapping, what are the key differences between TopHat and Illumina's eland-CASAVA pipeline for RNA-seq data?

  • #2
    i would appreciate if someone could give an appropriate answer!
    Thanks in advance!

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    • #3
      I heard from a talk given by Illumina, casava is good for reads length <= 50.

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      • #4
        The Illumina pipeline will only look for known splice junctions, while TopHat can (at least in theory) find novel splice junctions.

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        • #5
          Originally posted by kopi-o View Post
          The Illumina pipeline will only look for known splice junctions, while TopHat can (at least in theory) find novel splice junctions.
          Hi kopi-o,

          Thanks for highlighting that difference.

          One other difference could be the no. of basepairs that the algorithm expects as the 'seed' in order to generate accurate alignments. For illumina-eland, I know it is 32bp, but not sure what seed length does TopHat expect.

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          • #6
            Hi kopi-o,

            Thanks for highlighting the difference on splice junction prediction between Illumina-Eland and TopHat.

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