Hello. I'm need extract gene ID from fasta format file which includes multiple genes with their sequences. It looks like below: 

>BTBSCRYR|IV|123123-43245273
tgcaccaaacatgtctaaagctggaaccaaaattactttctttgaagacaaaaaggccgccactatgaca
+gcgattgcgactgtgcagatttccacatgtacctgagccgctg
>BTBSCRYADASR|IV|123123-43245273
gagctcccgggggagggaggacggccgggccggggcgctaagacccggggcgcggtggtagaggttccca
+gcaggacactagagggcgatccccggccctgctgcgggggtgtatata
gagctc

[download]
My final txt file must look like or include just gene ID's: 
BTBSCRYR
BTBSCRYADASR

[download]
Can some one make me a script which can do that. Thank you in advance

In reply to Extracting IDs from fasta file by MBobur

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