Perhaps the following will be helpful:

perl -ne 'chomp; $x=0; print if /^(?<!>)\S+$/' input_file.txt >output_
+file.txt

[download]

Output on your dataset:

tttgctcggaggggatcgaaaacacttccttattatacaggtaaaccgtatttggataaagctcggaggg
+gatcccct

[download]

Edit: Sorry... Didn't notice the "insert" spec.

In reply to Re: merge sequences with new sequence insertion by Kenosis
in thread merge sequences with new sequence insertion by utpalmtbi

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