This is cutadapt 2.8 with Python 3.7.4 Command line parameters: -a C{9} -m 20 -o Tp4_trimmed.trim.fastq Tp4_trimmed.fastq Processing reads on 1 core in single-end mode ... Finished in 109.58 s (10 us/read; 6.28 M reads/minute). === Summary === Total reads processed: 11,468,153 Reads with adapters: 65,525 (0.6%) Reads that were too short: 1,722 (0.0%) Reads written (passing filters): 11,466,431 (100.0%) Total basepairs processed: 809,016,522 bp Total written (filtered): 808,704,744 bp (100.0%) === Adapter 1 === Sequence: CCCCCCCCC; Type: regular 3'; Length: 9; Trimmed: 65525 times; Reverse-complemented: 0 times No. of allowed errors: 0-9 bp: 0 Bases preceding removed adapters: A: 31.5% C: 0.0% G: 39.2% T: 28.7% none/other: 0.6% Overview of removed sequences length count expect max.err error counts 3 43084 179189.9 0 43084 4 16262 44797.5 0 16262 5 1865 11199.4 0 1865 6 973 2799.8 0 973 7 514 700.0 0 514 8 299 175.0 0 299 9 92 43.7 0 92 10 26 43.7 0 26 11 379 43.7 0 379 12 41 43.7 0 41 13 38 43.7 0 38 14 17 43.7 0 17 15 21 43.7 0 21 16 34 43.7 0 34 17 16 43.7 0 16 18 47 43.7 0 47 19 96 43.7 0 96 20 16 43.7 0 16 21 79 43.7 0 79 22 57 43.7 0 57 23 20 43.7 0 20 24 34 43.7 0 34 25 20 43.7 0 20 26 59 43.7 0 59 27 92 43.7 0 92 28 85 43.7 0 85 29 28 43.7 0 28 30 48 43.7 0 48 31 71 43.7 0 71 32 21 43.7 0 21 33 105 43.7 0 105 34 36 43.7 0 36 35 15 43.7 0 15 36 17 43.7 0 17 37 13 43.7 0 13 38 19 43.7 0 19 39 16 43.7 0 16 40 11 43.7 0 11 41 11 43.7 0 11 42 22 43.7 0 22 43 5 43.7 0 5 44 3 43.7 0 3 45 1 43.7 0 1 46 2 43.7 0 2 47 2 43.7 0 2 48 6 43.7 0 6 49 1 43.7 0 1 50 69 43.7 0 69 51 54 43.7 0 54 52 101 43.7 0 101 53 163 43.7 0 163 54 19 43.7 0 19 55 44 43.7 0 44 56 31 43.7 0 31 57 21 43.7 0 21 58 13 43.7 0 13 59 5 43.7 0 5 60 19 43.7 0 19 61 7 43.7 0 7 62 5 43.7 0 5 63 6 43.7 0 6 64 35 43.7 0 35 65 5 43.7 0 5 66 2 43.7 0 2 67 11 43.7 0 11 68 76 43.7 0 76 69 2 43.7 0 2 70 9 43.7 0 9 71 26 43.7 0 26 72 2 43.7 0 2 73 2 43.7 0 2 74 45 43.7 0 45 75 33 43.7 0 33 76 1 43.7 0 1