We basically get questions like this from time to time here on Perlmonks regarding stuff that is probably already being done somewhere in BioPerl. It is not that we don't like answering Perl questions but you might be better served Googling 'bioperl forum.'

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In reply to Re: Extract subset of sequences from a FASTA file by InfiniteSilence
in thread Extract subset of sequences from a FASTA file by silver_steve

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