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Table 1 Summary of the number of reads at each processing step

From: A comprehensive analysis of piRNAs from adult human testis and their relationship with genes and mobile elements

Step/Sample S9217 S7964 S7963 Total
  Total Unique Total Unique Total Unique Total Unique
Raw reads 6.85 1.89 25.30 7.41 22.91 7.57 55.05 15.07
Step 1 6.19 1.77 22.79 7.04 21.87 7.49 50.85 14.51
Step 2 3.84 1.57 14.13 6.39 13.05 6.72 31.02 13.31
Step 3 2.62 1.26 12.68 5.76 11.86 6.19 27.17 11.91
Step 4 1.47 0.82 8.83 3.55 7.13 3.22 17.44 6.66
  1. Step 1. Remove 3’adapter sequence and remaining reads of size between 5 ~ 45 nt.
  2. Step 2. Remove known small RNAs.
  3. Step 3. Remove unmapped reads to the reference genome (hg19).
  4. Step 4. Select reads of size between 26 ~ 31 nt.
  5. Number of reads is in millions.