how can I retrieve one read sequence?

[hujiacun]

Hi, I use Integrative genomic Viewer to find one Read which mate is mapped=no.
This no mapped pair-end read may be a result from structural variation. So, if I know one read ID and its one end sequence, How can I get its pair-end sequence from raw Data.

Thanks!

[GenoMax]

If your sequence files are not compressed:

$ cat file.fastq | grep -A 3 "read_ID_you_want"

If they are compressed:

$ zcat file.fastq.gz | grep -A 3 "read_ID_you_want"

If you only want sequence (not full fastq record) then replace 3 with 1.