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  • luigra
    Junior Member
    • Jan 2012
    • 7

    #1

    Strange behavior of Cuffdiff

    Dear All,

    I have have observed this strange thing in analyzing the Cuffdiff results:

    there are some genes evidently different but with a small overlap (generally the final exon of one is overlapping with the first exon of the other one): they are annotated with the same xloc. Just to give an example in my case :

    grep "CCDC51" genes.fpkm_tracking

    XLOC_038619 - - XLOC_038619 CCDC51,RP11-24C3.2 TSS84938,TSS84939,TSS84940 chr3:48473573-48481529 - - 5.74368 4.08119 7.40618 OK 7.11625 4.60213 9.63036 OK 6.30723 4.33648 8.27799 OK

    Although I expected to find these genes with different Xloc the strange fact is that when I look in isoform_exp.diff I find the isoforms relative to both genes, viceversa looking in gene_exp.diff I find only one of the two genes. How this is possible?

    Thanks in advance
    Luigi
    Luigi Grassi
    Università degli Studi di Roma La Sapienza
    Dipartimento di Fisica
    Piazzale Aldo Moro 5, 00185 Roma

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