Dear Pantelis, pls note the results for Dr Matis http://genomics-lab.fleming.gr/fleming/Matis/run149 The alignments performed as follows: IonXpress_009_IMP1_4-5-6-7PeptideLinrary 16102381 reads; of these: 16102381 (100.00%) were unpaired; of these: 7311491 (45.41%) aligned 0 times 8790890 (54.59%) aligned exactly 1 time 0 (0.00%) aligned >1 times 54.59% overall alignment rate IonXpress_011_IMP2_A4VRound4 15233125 reads; of these: 15233125 (100.00%) were unpaired; of these: 7881760 (51.74%) aligned 0 times 7351365 (48.26%) aligned exactly 1 time 0 (0.00%) aligned >1 times 48.26% overall alignment rate IonXpress_015_IMP3_Ab42Round2 13825029 reads; of these: 13825029 (100.00%) were unpaired; of these: 3318079 (24.00%) aligned 0 times 10506950 (76.00%) aligned exactly 1 time 0 (0.00%) aligned >1 times 76.00% overall alignment rate A random sample of 1000 reads was drawn from the unmapped reads and aligned against NCBI's non-redundant database. The blast results and the distribution of the matching species are in: IMP1-unmapped-blast1000.txt IMP1-unmapped-blast1000-species.txt IMP2-unmapped-blast1000.txt IMP2-unmapped-blast1000-species.txt IMP3-unmapped-blast1000.txt IMP3-unmapped-blast1000-species.txt The number of reads in each library for each insert sequence is in: insert_samples_total_reads_ge10.xlsx (at least 10 reads in all libraries) and insert_samples_total_reads_gt1.csv (at least 2 reads in all libraries) The IMP* columns contain the number of reads with the given insert sequence. The norm_IMP* columns contain read counts with the given insert sequence divided by the total number of reads with inserts in the library. BW, Martin