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  • lajoieb
    Junior Member
    • Jan 2009
    • 4

    #1

    novoalign native output (strand+direction)

    I am trying to extract the tag alignment strand & direction from a novoalign native output.
    Not sure it's possible in this form, but alternatively is this something I can extract from a SAM formated output?

    EX. novoalign native output:
    PHP Code:
    @HWUSI-EAS1533_0017_FC:4:1:1962:934#0/1 S       NGCCACCAGGGAACACAGTGGTGCCCAGAAGCTGGG    (445588888@@@@@:::::::::::7:33:<:<:@    U       36      23      >chr3_13530     3306     F       .       .       .       34T>G
    @HWUSI-EAS1533_0017_FC:4:1:2011:940#0/1 S       NACAGACCTCCCCTTTCCCACCAGCCCCAGAGGCCC    ####################################    QC
    @HWUSI-EAS1533_0017_FC:4:1:2157:930#0/1 S       NGTCCCCATGTGTATTGAACTGGCACAAACTAAACT    '2/2355555@@@@@@@@@@@@@@@:::::@@@@@@    U       6       108     >chr7_10986     10565    F       .      .       . 
    I know the F and R represent alignment direction, but is that without regard to which strand the tag aligned to?
  • drio
    Senior Member
    • Oct 2008
    • 323

    #2
    Dump your NA alignements in SAM and inspect the 5th bit of the second field of your alignments.
    -drd

    Comment

    • sparks
      Senior Member
      • Mar 2008
      • 126

      #3
      The F & R give the direction of the alignment. This will correspond to strand if you have used a strand specific protocol to prepare your sample.
      Colin

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