We don't know for sure here, but I suspect that it is highly likely that the FASTA format is being used.

The OP should give us some input and output lines to make things clear. I suspect that it could also be that the bioPerl modules might be appropriate.

In reply to Re^2: Grep 1st word of strings in array by Marshall
in thread Grep 1st word of strings in array by imtakinbioinformatic

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