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Extract string between paranthesis

 
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# 1  
Old 03-03-2013
Extract string between paranthesis
Hi,

I have a file of fasta headers that looks like the following:

Code:
>gi|28476830|ref|NR_001281.1| Homo sapiens protocadherin beta 18 pseudogene (PCDHB18), non-coding RNA
>gi|187937204|ref|NR_023342.1| Homo sapiens keratin associated protein 20-4 (KRTAP20-4), non-coding RNA
>gi|221139737|ref|NR_024072.2| Homo sapiens MRS2 magnesium homeostasis factor homolog (S. cerevisiae) pseudogene 2 (MRS2P2), non-coding RNA
>gi|219881533|ref|NR_003932.2| Homo sapiens ribosomal protein L13a pseudogene 20 (RPL13AP20), non-coding RNA
>gi|93204855|ref|NR_003024.1| Homo sapiens eukaryotic translation initiation factor 3, subunit I pseudogene 1 (EIF3IP1), non-coding RNA
>gi|222831626|ref|NR_026740.1| Homo sapiens placenta-specific 9 pseudogene (LOC389033), non-coding RNA

I want to write a code to extract the string inside parantheses in each line. The difficulty is some of the lines how more than two strings inside parantheses (i.e. line 3) In such cases, I only want to extract the string inside the second paranthesis. My output should look like:

Code:
PCDHB18
KRTAP20-4
MRS2P2
RPL13AP20
EIF3IP1
LOC389033

How do I go about doing this? Thanks!
# 2  
Old 03-04-2013
Code:
awk ' { gsub(/.*\(|\).*/,x) } 1' file

This User Gave Thanks to Yoda For This Post:
evelibertine
# 3  
Old 03-04-2013
With all of the posts you have submitted and the help you've been given, I'm surprised that you aren't able to do this without our help. Here is another way to do this:
Code:
sed 's/.*(//;s/).*//' file

 
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