Extract specific peptides from a FASTA file
I hope someone could help me with a simple line command.
I have a protein FASTA file:
>Protein1
sequence
>protein2
sequence
I want to extract the sequences that has specifics peptides (ERLE). I could do that using grep -A, however it prints the sequence and the header of the below protein. For example, let say the sequence is on protein 1, when I use grep it prints the sequence 1 whit the header of protein 2:
sequence
>Protein2
Is there a way to solve that?
Thank you in advance
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1 answer
Look at -B option for grep.
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Thank you so much. Worked really well