1. Create a header with all the IDs - open/create file - start header file with "Source tRNA" - get ID via regex UNI_DATE_ID_ENDING_#NO - add ID to file - close file 2. Create new files -Titles: 5p-tR-halves 5p-tRFs p-tR-halves 3p-CCA-tRFs 3p-tRFs tRF-1 tRNA-leader misc-tRFs - add first column to each file: MT-TA MT-TC MT-TD MT-TE ... 3. - print the according columns from each mergerpt file from each folder into the new file - column assignment: 5p-tR-halves - 1 5p-tRFs - 2 p-tR-halves - 3 3p-CCA-tRFs - 4 3p-tRFs - 5 tRF-1 - 6 tRNA-leader - 7 misc-tRFs - 8 4. Add the ID header to each file #### MT-TA 5.36272153463324 21.4508861385329 8.04408230194985 34.857689975116 0 0 0 13.4068038365831 MT-TC 24.1322469058496 160.881646038997 48.2644938116991 37.5390507424327 45.5831330443825 0 0 104.573069925348 MT-TD 10.7254430692665 10.7254430692665 0 2.68136076731662 0 176.969810642897 1.34068038365831 445.105887374559