Fastq Process fastq files 1. Demultiplex multiplexed samples prepared by TruSeq library preparation. Usage: perl demultiplex_Truseq.pl file.R1.fastq file.R2.fastq i1.fastq barcode.txt a. R1 fastq file b. R2 fastq file c. barcode fastq file d. Barcode file (tab separated): Sample1 CTTGTA Sample2 ATCACG