What is a nucleotide? From Bio::Seq

    # gets sequence as a string from sequence object
    $seqstr   = $seqobj->seq(); # actual sequence as a string
    $seqstr   = $seqobj->subseq(10,50); # slice in biological coordina
+tes
$seqobj->length()            # length
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so I guess

$segstr = $segobj->subseg( $segobj->length - 20, $segobj->length );
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