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  • lewewoo
    Member
    • Apr 2011
    • 60

    #1

    How to get sequence from hg19.fa

    If I have sequence start and end coordinates, how can I get the sequence from local hg19.fa file. Either using samtools or perl will be good for me.
    hg19 has been indexed using samtools.
    Thanks!
  • SES
    Senior Member
    • Mar 2010
    • 275

    #2
    Originally posted by lewewoo View Post
    If I have sequence start and end coordinates, how can I get the sequence from local hg19.fa file. Either using samtools or perl will be good for me.
    hg19 has been indexed using samtools.
    Thanks!
    You can use the same command you used to index the fasta. That is, construct the index:

    Code:
    samtools faidx hg19.fa
    Then extract your subsequence:

    Code:
    samtools faidx hg19.fa 1:20-200
    You'll have to adjust the coordinates and chromosome for what you want. There is also a Perl package for working with SAM/BAM files that may be helpful if you have a lot of operations to perform.

    Comment

    • lewewoo
      Member
      • Apr 2011
      • 60

      #3
      thanks

      will try it

      Comment

      • TiborNagy
        Senior Member
        • Mar 2010
        • 329

        #4
        Or you can use seqret in Emboss. You do not need to index your reference.

        Comment

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