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  • #16
    yes, I think..see the link from where I got those files

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    • #17
      That's normal, the fasta file(s) (*.fa) is/are used to make the indices (*.bt2), so there's no reason for it to create a copy.

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      • #18
        I think the fasta file is in fasta format, as when I open it in texteditor, the first few lines looks like this

        >1
        CCCTAAACCCTAAACCCTAAACCCTAAACCTCTGAATCCTTAATCCCTAAATCCCTAAATCTTTAAATCC
        TACATCCATGAATCCCTAAATACCTAATTCCCTAAACCCGAAACCGGTTTCTCTGGTTGAAAATCATTGT
        GTATATAATGATAATTTTATCGTTTTTATGTAATTGCTTATTGTTGTGTGTAGATTTTTTAAAAATATCA
        TTTGAGGTCAATACAAATCCTATTTCTTGTGGTTTTCTTTCCTTCACTTAGCTATGGATGGTTTATCTTC
        ATTTGTTATATTGGATACAAGCTTTGCTACGATCTACATTTGGGAATGTGAGTCTCTTATTGTAACCTTA
        GGGTTGGTTTATCTC,

        when i open this file in the terminal it looks

        cat Arabidopsis_thaliana_NCBI_TAIR10/Arabidopsis_thaliana/NCBI/TAIR10/Sequence/Bowtie2Index/genome.fa
        XSym
        0029
        7ec8fcfa270da919afc1f0afd221e788
        ../WholeGenomeFasta/genome.fa
        so fasta file seems to be good

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        • #19
          ok,,now I understand that why I don't see copy of fasta file, when I create indices

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          • #20
            Originally posted by hathiram2 View Post
            cat Arabidopsis_thaliana_NCBI_TAIR10/Arabidopsis_thaliana/NCBI/TAIR10/Sequence/Bowtie2Index/genome.fa
            XSym
            0029
            7ec8fcfa270da919afc1f0afd221e788
            ../WholeGenomeFasta/genome.fa
            so fasta file seems to be good
            Ah, after a bit of googling and a hunch, are you using Mac OSX and these files are being held on a fat32 formatted file system (likely an external hard drive, or maybe even a network share via samba)? That is what a symbolic link looks like in these situations (who knew?). If you get this result when you use cat, then I expect the link is also not transparent for gtf_to_fasta. In that case, you might have to copy the ../WholeGenomeFasta/genome.fa file to Arabidopsis_thaliana_NCBI_TAIR10/Arabidopsis_thaliana/NCBI/TAIR10/Sequence/Bowtie2Index/genome.fa

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            • #21
              libz warning?

              Originally posted by dpryan View Post
              The libz warning can be ignored. I've not seen that particular error, but the source code suggests that the fasta file doesn't start with a ">Something" line. Is this the case?
              dpryan, how does one ignore the libz warning? I got that warning while trying to use bam2fastx from top hat 2.0.9...

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