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  • Protaeus
    Member
    • Aug 2010
    • 21

    #1

    ID'ing Uniquely Mapped Regions in BWA

    I have another BWA inquiry. How can one id the uniquely mapped reads from a sam/bam generated by BWA? Thanks for any thoughts.
  • dawe
    Senior Member
    • Apr 2009
    • 258

    #2
    Originally posted by Protaeus View Post
    I have another BWA inquiry. How can one id the uniquely mapped reads from a sam/bam generated by BWA? Thanks for any thoughts.
    They have XT tag set to "U".

    Comment

    • epigen
      Senior Member
      • May 2010
      • 101

      #3
      You can use samtools view -q 1 to only output uniquely mapped reads (and omit both unmapped and ambiguous ones). Ambiguous reads that can be mapped to different locations with the same score have mapping quality 0 in BWA.

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