Dear Panagiotis, I've made the 2 DE analysis. Results are at http://genomics-lab.fleming.gr/fleming/GKlab/Roumelioti/run139 in the dirs: cuffdiff_GKR13-wt1early_vs_GKR2-DARE1early cuffdiff_GKR7-wt1late_vs_GKR8-DARE1late BW, Martin @@ Panagiotis Chouvardas Feb 9,2015 to me The contrast groups are DAREearly VS WTearly and DARElate VS WTlate. I think the 1st samples of each group are those missing, so it can not be done at the moment. If it is any kind of trouble, there is no problem running the differential expression analysis myself. Best, P. @@ 09022015 Dear Panagiotis, of the 6 Proton runs, 4 have finished my analysis. You can find these 4 at http://genomics-lab.fleming.gr/fleming/GKlab/Roumelioti/ in the dirs run130 run132 run134 run135 In each dir, the file samples.txt describes the identity of each sample and basic stats (#reads ...). In each dir, there is a dir called tophat_XXX for each barcode XXX. In these dirs, the file sort_uniq.bam is the final file with all reads and alignments to mm9. If you want to use Cufflinks, you shound add a header to these with samtools reheader ... . The other 2 runs should finish tomorrow evening. Let me know is you need any help. Best wishes, Martin