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  • lre1234
    Senior Member
    • Aug 2011
    • 110

    #1

    SOLiD fastq file question

    Hi all,
    I just downloaded a public SOLiD whole genome dataset from the short read archive, and converted the .sra file to a fastq file. The fastq file is formated like this:

    @ERR123473.934 1_25_1048 length=120
    T100312003001020023222130331202112031020303121031301231232221G233113003011330303111102100131333312213333220011200121003033
    +ERR123473.934 1_25_1048 length=120
    !>@6@@@?@@=2@<@>2@?@>@@:@>=@@@2@@@?@=;@@@;@2@@/@/@>6@/?<2@8@?!@@@@@@@@@@@@@@@@@@@@@@@?@@@@>@@@@<@@@?@@@@@=@@@@@@@@2>@@</@@

    These data are a 1000 genomes sample sequenced with paired end, I believe with 2 X 60 reads. Why is it saying that the length is 120? Is the 'G' in the middle (highlighted in red), separating each read, and shouldn't they be as 2 separate entries in the file?

    I am just a little confused on the format here.
    Thanks for any help

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