zcat NAC61_rep1.fastq.gz | wc -l > NAC61_rep1.fastq.lines
zcat NAC61_rep2.fastq.gz | wc -l > NAC61_rep2.fastq.lines
zcat halo_nac_r1.fastq.gz | wc -l > halo_nac_r1.fastq.lines
zcat halo_nac_r2.fastq.gz | wc -l > halo_nac_r2.fastq.lines